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FOCI
FOCI
Look up focus or foci in Wiktionary, the free dictionary. Focus (pl.: foci or focuses) may refer to: Focus or Focus Festival, former name of the Adelaide
A focus of infection is a place containing whatever epidemiological factors are needed for transmission of an infection. Any focus of infection will have
In geometry, focuses or foci (/ˈfoʊsaɪ/ or /ˈfoʊkaɪ/; sg.: focus) are special points with reference to which any of a variety of curves is constructed
A hypocenter or hypocentre, also called ground zero or surface zero, is the point on the Earth's surface directly below a nuclear explosion, meteor air
bipolar coordinate system about the axis that separates its two foci. Thus, the two foci F 1 {\displaystyle F_{1}} and F 2 {\displaystyle F_{2}} in bipolar
in the plane such that the product of the distances to two fixed points (foci) is constant. This may be contrasted with an ellipse, for which the sum of
and tangent to the sides at their midpoints: the Steiner inellipse. The foci of that ellipse are the zeroes of the derivative p'(z). This proof comes
locus of points such that the sum of the distances to two fixed points (the foci) is constant. The second theorem is that for any conic section, the distance
further used on occasion to describe other curves having two singular points (foci), such as ellipses, hyperbolas, and Cassini ovals. However, the term bipolar
the apical pleura. In adolescence, Simon foci may become reactivated and develop into Assmann foci. Such foci are sharply circumscribed, firm, gray-white
FOCI
FOCI
FOCI
Acronyms & AI meanings
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FOCI
FOCI
FOCI
pl.
of Focus
v. t.
To nourish.
n.
The convergence to different foci, by a lens or mirror, of rays of light emanating from one and the same point, or the deviation of such rays from a single focus; called spherical aberration, when due to the spherical form of the lens or mirror, such form giving different foci for central and marginal rays; and chromatic aberration, when due to different refrangibilities of the colored rays of the spectrum, those of each color having a distinct focus.
n.
Comfort; support.
n.
One of foci of an ellipse, or other curve.
a.
Having the same foci; as, confocal quadrics.
n.
An assisting instrument for focusing an object in or before a camera.
n.
A curve formed by a section of a cone, when the cutting plane makes a greater angle with the base than the side of the cone makes. It is a plane curve such that the difference of the distances from any point of it to two fixed points, called foci, is equal to a given distance. See Focus. If the cutting plane be produced so as to cut the opposite cone, another curve will be formed, which is also an hyperbola. Both curves are regarded as branches of the same hyperbola. See Illust. of Conic section, and Focus.
FOCI
FOCI