Search references for THRESHOLD EXPRESSION. Phrases containing THRESHOLD EXPRESSION
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Mitochondrial threshold effect is a phenomenon where the number of mutated mtDNA has surpassed a certain threshold which causes the electron transport
Threshold_expression
Topics referred to by the same term
threshold Renal threshold Seizure threshold Sensory threshold Threshold expression Threshold limit value Threshold model Threshold of pain Threshold potential
Threshold
Graph measuring gene relationships
co-expression networks. In principle, they all follow a two step approach: calculating co-expression measure, and selecting significance threshold. In
Gene_co-expression_network
Particle creation energy in physics
In particle physics, the threshold energy for production of a particle is the minimum kinetic energy that must be imparted to one of a pair of particles
Threshold_energy
Threshold of percolation theory models
The percolation threshold is a mathematical concept in percolation theory that describes the formation of long-range connectivity in random systems. Below
Percolation_threshold
Disorders caused by mitochondrial dysfunction
mitochondria reaches a certain level; this phenomenon is called "threshold expression". Mitochondria possess many of the same DNA repair pathways as nuclei
Mitochondrial_disease
Oil painting by Vincent van Gogh
eternity, is the unutterably moving quality that there can be in the expression of an old man like that, without his being aware of it perhaps, as he
At_Eternity's_Gate
Function definition that is not bound to an identifier
example binds the variable "threshold" within an anonymous function that compares input values to this threshold. def comp(threshold: int) -> Callable[[int]
Anonymous_function
1969 studio album by the Moody Blues
On the Threshold of a Dream is the fourth album by the Moody Blues, released in April 1969 on the Deram label. The album reached the top of the album
On_the_Threshold_of_a_Dream
American actress (born 1971)
the crime drama series Karen Sisco (2003), the science fiction series Threshold (2005–2006), the crime drama series Jett (2019), and the supernatural
Carla_Gugino
Intense hostile emotional state of mind
organizational norms establish emotion thresholds that may be crossed when employees feel anger. The first "expression threshold" is crossed when an organizational
Anger
Technique for creating lexically scoped first class functions
lambda expression (lambda (book) (>= (book-sales book) threshold)) appears within the function best-selling-books. When the lambda expression is evaluated
Closure (computer programming)
Closure_(computer_programming)
Input power level at which a laser generates light primarily by stimulated emission
In laser science, the lasing threshold is the lowest excitation level at which a laser's output is dominated by stimulated emission rather than by spontaneous
Lasing_threshold
Boolean polynomials as sums of monomials
performed using elementary algebra. For example, the Boolean 2-out-of-3 threshold or median operation is written as the Zhegalkin polynomial xy⊕yz⊕zx. In
Algebraic_normal_form
Minimal requirement for copyright
In copyright law, the threshold of originality is used to assess whether a particular work can be copyrighted. It is used to distinguish works that are
Threshold_of_originality
from the database which resemble the query sequence above a specified threshold of similarity. Such comparisons can permit the identification of an organism
Glossary of cellular and molecular biology (0–L)
Glossary_of_cellular_and_molecular_biology_(0–L)
Minimum energy required for a chemical reaction
with the threshold barrier for an elementary reaction. First, it is often unclear as to whether or not reaction does proceed in one step; threshold barriers
Activation_energy
Laboratory technique of molecular biology
few genes show equal levels of expression across a range of different conditions or tissues. Although cycle threshold analysis is integrated with many
Real-time polymerase chain reaction
Real-time_polymerase_chain_reaction
Sensory stimuli below an individual's threshold for conscious perception
stimuli below an individual's threshold or limit for conscious perception, in contrast to supraliminal stimuli (above threshold). Visual stimuli may be quickly
Subliminal_stimuli
Observed inability to reproduce scientific studies
critical value/threshold t threshold {\displaystyle t_{\text{threshold}}} . If t [ D ] > t threshold {\displaystyle t[D]>t_{\text{threshold}}} , then output
Replication_crisis
Evolutionary algorithm
Gene expression programming (GEP) in computer programming is an evolutionary algorithm that creates computer programs or models. These computer programs
Gene_expression_programming
Ancient Egyptian religious festivities
two palms in length (67 cm ), the head turned towards the north. The threshold of the room is guarded by two statuettes of Hu and Sia, personifications
Mysteries_of_Osiris
String matching algorithm
searches that are regular expressions or match the text inexactly. Indexes can significantly accelerate searches. A threshold for number of trigram matches
Trigram_search
Nonlinear force experienced by a charged particle
the particle accelerate towards the area of lesser force. The classical expression for the ponderomotive force Fp is F p = {\displaystyle \mathbf {F} _{\text{p}}=}
Ponderomotive_force
Statistical hypothesis testing measure
(i.e. detecting differential expression in a gene that is not differentially expressed) but imposes a strict threshold for the p-value that results in
Q-value_(statistics)
September 13, 1977 Label: ABC/Dot Records Formats: LP, cassette 9 — — 11 Expressions Release date: August 23, 1978 Label: ABC/Dot Records Formats: LP, cassette
Don_Williams_discography
"All yours", Latin motto used by Pope John Paul II
meaning further in his 1994 book Crossing the Threshold of Hope where he defines it as not only an expression of piety but also of devotion that is deeply
Totus_tuus
Virus that infects bacteria
viruses at the treatment's conclusion. Establishing a secure discharge threshold, studies have determined that discharges below 3000 PFU/100 mL are considered
Bacteriophage
Events unlikely to occur
selecting events that exceed a certain threshold of intensity (or frequency, or impact, etc., not shown). This threshold might select events lying above a
Rare_events
Clarity of vision
the looming threshold to be in the range of 0.003 radian/sec. Forensic practitioners routinely use elevated values of the looming threshold, e.g., 0.005–0
Visual_acuity
thresholding encodes gene connections in a binary fashion, it can be sensitive to the choice of the threshold and result in the loss of co-expression
Weighted correlation network analysis
Weighted_correlation_network_analysis
Web browser developed by Google
started rising again and by December 2008, Chrome again passed the 1% threshold. In early January 2009, CNET reported that Google planned to release versions
Google_Chrome
1760s legal maxim by William Blackstone
between the familiar "ten guilty persons" ratio and a specific probability threshold in criminal trials. For example, Jack B. Weinstein wrote that Blackstone's
Blackstone's_ratio
Leader of China since 2012
of poverty under his tenure, though some experts said China's poverty threshold was lower than that of the World Bank. In 2020, premier Li Keqiang, citing
Xi_Jinping
schools nevertheless effectively reject these children by setting high thresholds such as school fees and exams or by requesting an urban registration (Hukou)
Education_in_China
Supreme Court of Canada case
'vilification'", a threshold which would not include merely repugnant or offensive expression, and that tribunals should consider the effect of the expression, not
Saskatchewan Human Rights Commission v Whatcott
Saskatchewan_Human_Rights_Commission_v_Whatcott
Sense of chemicals on the tongue
Taste detection thresholds for sweet substances are rated relative to sucrose, which has an index of 1. The average human detection threshold for sucrose
Taste
Country in South Asia
1080/14662043.2024.2397851. ISSN 1743-9094. Lalwani, Sameer P. (March 2023). A Threshold Alliance: The China-Pakistan Military Relationship (PDF). United States
Pakistan
Theory in continuum mechanics
Steinberg–Cochran–Guinan–Lund model. the Zerilli–Armstrong model. the Mechanical threshold stress model. the Preston–Tonks–Wallace model. The Johnson–Cook (JC) model
Viscoplasticity
1986 nuclear accident in the Soviet Union
the malformation of organs appears to be a deterministic effect with a threshold dose. Studies on regions of Ukraine and Belarus suggest that around 50
Chernobyl_disaster
Logic formula
truth value. A propositional formula may also be called a propositional expression, a sentence, or a sentential formula. A propositional formula is constructed
Propositional_formula
Estimated likelihood of precipitation occurring within a specified forecast region
Office reports a PoP that is rounded to 5% and is based on a minimum threshold of 0.1 mm of precipitation. The probability of precipitation can also
Probability_of_precipitation
Type of field-effect transistor
in the body is called the threshold voltage. When the voltage between transistor gate and source (VG) exceeds the threshold voltage (Vth), the difference
MOSFET
Event, volcanic CO2 emissions and the crossing of an associated climate threshold is presented by Bauer et al. (2024). Evidence from oxygen isotope values
2024_in_paleontology
In neuroscience, aspect of a cell membrane
motor nerves. Many studies have suggested that differences in the expression of threshold channels could account for the sensory-motor differences in strength-duration
Rheobase
Visual art depiction of female-female sexuality
Lesbian erotica is artistic depiction of lesbianism, which is the expression of female-on-female sexuality. Lesbianism has been a theme in erotic art since
Lesbian_erotica
Input-output gain of a detector system
the inverse of the stimulus level required to produce a threshold response, with the threshold typically chosen just above the noise level. Noise-equivalent
Responsivity
Country in West Asia
location, and its role as the world's focal point of Shia Islam. Iran is a threshold state with one of the most scrutinized nuclear programs. It is a founding
Iran
Unicameral legislature of Hungary
body was originally "Parlamentum" during the Middle Ages, the "Diet" expression gained mostly in the Early Modern period. It convened at regular intervals
National_Assembly_(Hungary)
Hematologic cancer that affects lymphocytes
transfusions depending on the way they were used (therapeutic, depending on a threshold, different dose schedules or prophylactic). Four chimeric antigen receptor
Lymphoma
Level of extinction from which a species cannot recover
genetic, demographic, or environmental factors. The quasi-extinction threshold, or sometimes called the quasi-extinction risk is the population size
Quasi-extinction
Quality of ambiguity, disorientation, or state of transition
In anthropology, liminality (from Latin limen 'threshold') is the quality of ambiguity or disorientation that occurs in the middle stage of a rite of
Liminality
United States obscenity law expression
by United States Supreme Court Justice Potter Stewart to describe his threshold test for obscenity in Jacobellis v. Ohio. In explaining why the material
I_know_it_when_I_see_it
2025 music award ceremony
representation of the songwriter community", with the minimum submission threshold in which a songwriter is credited as a songwriter or co-writer (not a
67th_Annual_Grammy_Awards
Topic in comparative religion
South Siberian arc (Altai, Tuva, Buryatia) was described as a northern threshold to the same "central" wisdom. Explorers such as Sven Hedin and Francis
Western esotericism and Eastern religions
Western_esotericism_and_Eastern_religions
Danish artist
other motifs it is the ultimate threshold before death, as seen in Den syge mand and På kirkegården i Fløng. Another threshold motif is the meeting between
L._A._Ring
Devaluation of money's purchasing power
investigation there is only one meaning that can rationally be attached to the expression Inflation: an increase in the quantity of money (in the broader sense
Inflation
British leadership election to challenge John Major
had made up his mind to resign outright if he had failed to meet this threshold. No further leadership elections took place until after the Conservatives
1995 Conservative Party leadership election
1995_Conservative_Party_leadership_election
Demarcated group of source code statements that run in sequence
code. if wages > tax_threshold then begin paystax := true; tax := (wages - tax_threshold) * tax_rate if wages > supertax_threshold then begin pays_supertax
Block_(programming)
Feature of the Caspian seafloor
The Apsheron Sill, Absheron Sill, Apsheron Ridge or Apsheron Threshold is a major northwest-southeast-trending bathymetric high that runs for about 250
Apsheron_Sill
Italian expression of encouragement used in the performing arts
break a leg, the expression reflects a theatrical superstition in which wishing a person good luck is considered bad luck. The expression is commonly used
In_bocca_al_lupo
Faculty of mind to store and retrieve data
an action potential that passes threshold, resulting in trap closure. Researchers, to prove that an electrical threshold must be met to stimulate trap closure
Memory
International airport serving Delhi, India
a displaced threshold of 152 m (499 ft). Thus aircraft landing on runway 27 will have to avoid touching down on the displaced threshold but may use it
Indira Gandhi International Airport
Indira_Gandhi_International_Airport
History of the city of Ningbo, China
confidence in official favor Happening to see in the mosque, and on the threshold as you enter the sacred ground, a tablet • similar to that found in every
History_of_Ningbo
Cancer of the colon or rectum
research in the UK has found that for these immunochemical tests, the threshold for further investigation is set at a point that may miss more than half
Colorectal_cancer
Founding Father of the United States (1722–1803)
on Boston December 3, 1787, "as I enter the Building I stumble at the Threshold. I meet with a National Government, instead of a Federal Union of States
Samuel_Adams
Theoretical limit on rate of mutation
In evolutionary biology and population genetics, the error threshold (or critical mutation rate) is a limit on the number of base pairs a self-replicating
Error_threshold_(evolution)
Study of DNA modifications that do not change its sequence
Epigenetics is the study of changes in gene expression that occur without altering the DNA sequence. The Greek prefix epi- (ἐπι- "over, outside of, around")
Epigenetics
Satirical news website
'what is it about that site that makes its content trigger the fact-check threshold?'" In August 2019, Snopes announced a new rating for satire sites called
The_Babylon_Bee
Prime Minister of Armenia since 2018
votes and came in 13th, with 1.28% of the overall vote, far below the threshold. Following the election, Pashinyan held a two-day sit-in at Freedom Square
Nikol_Pashinyan
American slasher film
financial compensation for the principal cast and crew, tied to box office thresholds beginning at $40 million and increasing in $10 million increments up to
Scream_(1996_film)
Historical process by which the lower River Thames was turned into a tidal canal
Hundred Points of Good Husbandry, London, 1573, quoted Michael Hattaway, Thresholds: Engineering and Literature East of the City. Galloway 2009, p. 174. Redman
Embanking_of_the_tidal_Thames
Species of bacterium
stimulation of TLR2/1 signaling has been proposed to increase the activation threshold of pro-inflammatory signaling, leading to weaker signals being ignored
Akkermansia_muciniphila
Probability distribution
expectation of a random variable X {\displaystyle X} with respect to a threshold k {\displaystyle k} is defined as g ( k ) = ∫ k ∞ x f X ( x ) d x . {\displaystyle
Log-normal_distribution
U.S. presidential administration since 2025
November, Senate had 14 votes, all of which failed to reach the 60-vote threshold. The shutdown ended on November 12. In early October, Senate majority
Second presidency of Donald Trump
Second_presidency_of_Donald_Trump
fee. Also, monthly thresholds are set for each household, again depending on income and age, and medical fees exceeding the threshold are waived or reimbursed
Economy_of_Japan
Capital and most populous city of DR Congo
the soil and do not contribute to surface runoff until the retention threshold is surpassed, at which point excess water seeps downward to replenish
Kinshasa
Image processing method
problem of appropriate thresholds for thresholding is by using thresholding with hysteresis. This method uses multiple thresholds to find edges. We begin
Edge_detection
Physical transition from a child to an adult
University of Reading. Lewis M, Shapland F, Watts R (2016). "On the threshold of adulthood: A new approach for the use of maturation indicators to assess
Puberty
Russian politician and lawyer (born 1965)
amendment to the election law which would decrease the State Duma election threshold from 7% to 5%. The amendment was signed into law in Spring 2009. Parties
Dmitry_Medvedev
Condition involving social and behavioral differences
Abrahams BS, Geschwind DH (May 2008). "Advances in autism genetics: on the threshold of a new neurobiology". Nature Reviews. Genetics. 9 (5): 341–355. doi:10
Autism
guarantees and protects Singaporeans' rights to freedom of speech and expression, peaceful assembly without arms, and association. As a parliamentary democracy
Human_rights_in_Singapore
Signaling molecule enabling detection and response to cell-population density
bacterium's detection of an autoinducer above some minimum threshold triggers altered gene expression. Performed by both Gram-negative and Gram-positive bacteria
Autoinducer
Historical commune in the western suburbs of Paris
(more rarely a horse), a second floor or attic, and a cellar. The houses' thresholds were relatively high to prevent flooding during storms. This is how most
History_of_Suresnes
Text by Walter Benjamin, 1932 to 1938
research, the city as a mythical labyrinth, the spatialization of memory and threshold spaces, visual images and photography, the child's mimetic experience
Berlin_Childhood_around_1900
its European allies, saying its limited response to date was "below the threshold" of all-out war and indicated a willingness to reenter nuclear negotiations;
Reactions to the Twelve-Day War
Reactions_to_the_Twelve-Day_War
Japanese singer and songwriter (born 1955)
the drop-down menu "Japanese album certifications – Takeuchi Mariya – Expressions" (in Japanese). Recording Industry Association of Japan. Select 2013年05月
Mariya_Takeuchi
tier payments reduced from $1500 to $1200 per fortnight, and the lower threshold will be determined by the number of hours worked; Josh Frydenberg announced
List of The Weekly with Charlie Pickering episodes
List_of_The_Weekly_with_Charlie_Pickering_episodes
Ability of an organism to exert itself and remain active for a long period of time
between 55% and 65% of maximum heart rate. Aerobic, anaerobic and further thresholds are not to be mentioned within extensive endurance exercises.[why?] Training
Endurance
cost‑effectiveness of male HPV vaccination substantially exceeded commonly used thresholds. In a subsequent review in September 2025, the committee again concluded
HPV_vaccination_in_Japan
web tool for designing RNA-Seq experiments to measure differential gene expression. ssizeRNA Sample Size Calculation for RNA-Seq Experimental Design. Quality
List of RNA-Seq bioinformatics tools
List_of_RNA-Seq_bioinformatics_tools
Country in Northern Europe
fulfill climate commitments. Currently, the government maintains a harvest threshold of at least 9.5 million m3 to balance economic impacts and environmental
Estonia
Genetic trait
impact expression, as chickens will not lay as many eggs depending on the time of year. Threshold traits have phenotypes that have limited expressions (usually
Complex_traits
Related laws in the field of psychophysics
stimulus. The brain is a percentage of change detector. The differential threshold is the smallest difference needed to differentiate two stimuli for each
Weber–Fechner_law
Pleshette as Anne Underhill February 21, 1960 (1960-02-21) 175 22 "Across the Threshold" Arthur Hiller Story by : L. B. Gordon Teleplay by : Charlotte Armstrong
List of Alfred Hitchcock Presents episodes
List_of_Alfred_Hitchcock_Presents_episodes
Medication mainly used for depression and smoking cessation
individuals with epilepsy or other conditions that lower the seizure threshold, such as anorexia nervosa, bulimia nervosa, or benzodiazepine or alcohol
Bupropion
1889 painting by Vincent van Gogh
and which "gives a never-to-be-forgotten sensation of standing on the threshold of eternity." Loevgren praises Schapiro's "eloquent interpretation" of
The_Starry_Night
Notation for expressing numbers
tn is the threshold for the n-th digit, it is easy to show that b n + 1 = 36 − t n {\displaystyle b_{n+1}=36-t_{n}} . Suppose the threshold values for
Numeral_system
Form of extradition in the EU
process, freedom of association, freedom of the press and freedom of expression in other media. Recital (13) No person should be removed, expelled or
European_Arrest_Warrant
that the overhaul is necessary to eliminate barriers such as candidate thresholds and to open political participation beyond well-funded individuals or
August 2025 Indonesian protests
August_2025_Indonesian_protests
THRESHOLD EXPRESSION
THRESHOLD EXPRESSION
Surname or Lastname
English
English : probably a nickname from Middle English gode ‘good’ (Old English gÅd) + year, yere ‘year’, bestowed on someone who frequently used the expression, perhaps in the sense ‘(as I hope to have a) good year’ or as a New Year salutation. Alternatively, it may have been from an Americanized form of French Gauthier.English translation of German Gutjahr, originally a nickname for someone born on New year’s Day.The inventor of vulcanized rubber, Charles Goodyear (1800–60) was of the fourth generation descended from Stephen Goodyear (1598–1658), who succeeded Gov. Theophilus Eaton as leader of the company of London merchants that founded the New Haven colony in CT in 1638.
Surname or Lastname
English
English : occupational name from Old French guyour ‘guide’ (see Guy 2).Americanized spelling of German Geyer.Swiss German : from a contraction of the expression gut Jahr (‘good year’) which as a greeting in rural Switzerland meant ‘I wish you a good harvest this year’.
Biblical
threshold; silver cup
Girl/Female
Latin
Goddess of the threshold.
Boy/Male
Arabic, Muslim
Gateway; Threshold
Surname or Lastname
English
English : presumably a nickname for an habitual user of the expression ‘Go well’ (Old English gÄn ‘go’ + wel ‘well’), or possibly a nickname for a messenger.
Boy/Male
Indian
Threshold
Girl/Female
Latin
Goddess of the threshold.
Surname or Lastname
English (Norfolk)
English (Norfolk) : from Middle English gode ‘good’ + body ‘person’, ‘creature’, apparently a nickname for a good person. Reaney, however, notes that the expression was used as a polite term of address, and the surname may therefore have arisen as a nickname for someone who habitually used this expression.
Surname or Lastname
English, Scottish, Dutch, and German
English, Scottish, Dutch, and German : metonymic occupational name for a herring fisher or for a seller of the fish, Middle English hering, Dutch haring, Middle High German hærinc. In some cases it may have been a nickname in the sense of a trifle, something of little value, a meaning which is found in medieval phrases and proverbial expressions such as ‘to like neither herring nor barrel’, i.e. not to like something at all.German : habitational name from Herringen in Westphalia.Dutch : from a personal name, a derivative of a Germanic compound name with the first element hari, heri ‘army’.Jewish (Ashkenazic) : variant spelling of Hering.
Girl/Female
Australian, French, Indian, Latin, Malayalam
Cultural; Goddess of the Threshold
Boy/Male
Muslim
Threshold
Surname or Lastname
English
English : occupational name for someone who did piece-work (especially someone who threshed grain), from an agent derivative of Anglo-Norman French tasque ‘task’ (Old French tasche, Late Latin taxa, of uncertain origin).Slovenian (Tašker) : unexplained.
Boy/Male
Arabic, French, Gujarati, Hindu, Indian, Muslim, Sindhi
Old Arabic Name; Threshold
Surname or Lastname
English
English : variant of Selman.German (Sillmann) : possibly a variant of Sieler, or a topographic name for someone living on a ridge, from Low German süll, sill ‘sill’, ‘threshold’, ‘ramp’.
Boy/Male
Arabic, Muslim
Threshold; Gateway
Surname or Lastname
English
English : from the expression ‘God speed (you)’; a wish for success for one setting out on an enterprise, presumably applied as a nickname for someone who habitually used this expression.
Surname or Lastname
English
English : probably a variant spelling of Purcell, or alternatively of Percil (from Old French percer ‘to pierce’ + soel, suel ‘threshold’).
Boy/Male
Biblical
Threshold, silver cup.
Boy/Male
Muslim/Islamic
Threshold
THRESHOLD EXPRESSION
THRESHOLD EXPRESSION
Girl/Female
Muslim
Honey that flows from the comb
Boy/Male
Biblical
Navel, thought, singing.
Girl/Female
Hindu
Grand
Boy/Male
Afghan, Arabic, Celebrity, Indian, Kashmiri, Muslim, Parsi
Power of Discrimination; Happy; Fortunate
Male
Basque
, rich guard.
Boy/Male
Muslim
The unbeatable, Sky
Surname or Lastname
English
English : unexplained.
Surname or Lastname
English
English : of uncertain origin, perhaps, as Reaney suggests, from a pet form of the Old English personal name Wippa, or perhaps a topographic name for someone who lived by a whipple tree, whatever that may have been. Chaucer lists whippletree (probably a kind of dogwood) along with maple, thorn, beech, hazel, and yew.Matthew Whipple came from England to Ipswich, MA, in about 1638. His descendent William Whipple (1730–85) born in Kittery, ME, was a signer of the Declaration of Independence.
Girl/Female
Arabic, Australian, French, German
The Weaning; The Abstaining
Boy/Male
American, Anglo, Australian, British, Christian, English, Irish, Scandinavian
Charcoal Burner; Follower of Nicholas; Little; Dove; Saint; Austria
THRESHOLD EXPRESSION
THRESHOLD EXPRESSION
THRESHOLD EXPRESSION
THRESHOLD EXPRESSION
THRESHOLD EXPRESSION
n.
Threshold.
a.
The quality or state of being triple, or threefold; trebleness.
imp. & p. p.
of Thresh
a.
Threefold; triple; consisting of three; ternate.
a.
Threefold.
v. i.
To become threefold.
a.
Consisting of three, or thrice repeated; triple; as, threefold justice.
n.
Fig.: The place or point of entering or beginning, entrance; outset; as, the threshold of life.
adv.
In a threefold manner or degree; repeatedly; very.
v. t.
To make thrice as much; to make threefold.
v. t.
To step over; to stride over or across; as, to bestride a threshold.
n.
The plank, stone, or piece of timber, which lies under a door, especially of a dwelling house, church, temple, or the like; the doorsill; hence, entrance; gate; door.
n.
Threshold.
v. t.
Made thrice as much; threefold; tripled.
n.
The timber or stone at the foot of a door; the threshold.
a.
Triple; treble; threefold.
n.
The stone forming a threshold.
a.
Threefold; triple.
n.
The sill or threshold of a door.
a.
Threefold; thrice-paired.