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What is the meaning of FOCAL. Phrases containing FOCAL
See meanings and uses of FOCAL!FOCAL
FOCAL
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Acronyms & AI meanings
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FOCAL
FOCAL
FOCAL
a.
Belonging to,or concerning, a focus; as, a focal point.
n.
The act of focalizing or bringing to a focus, or the state of being focalized.
a.
Specifically, having such a combination of concave and convex sides as makes the focal axis the shortest line between them. See Illust. under Lens.
v. t.
To bring to a focus; to focus; to concentrate.
n.
A defect of the eye or of a lens, in consequence of which the rays derived from one point are not brought to a single focal point, thus causing imperfect images or indistinctness of vision.
p. pr. & vb. n.
of Focalize
n.
The reciprocal of the focal distance of a lens, used as measure of the divergence or convergence of a pencil of rays.
n.
A unit employed by oculists in numbering glasses according to the metric system; a refractive power equal to that of a glass whose principal focal distance is one meter.
v. t.
To bring to a focus; to focalize; as, to focus a camera.
n.
A lens or mirror, usually of short focal distance, used to concentrate light upon an object.
n.
An instrument for measuring the limits of distincts vision in different individuals, and thus determiming the proper focal length of a lens for correcting imperfect sight.
imp. & p. p.
of Focalize
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