Adjacent Words

Optic definitions

	Tweet

Webster's 1828 Dictionary

OP'TIC,'TICAL, a. [Gr. from to see, the eye.]

WordNet (r) 3.0 (2005)

adj
1: of or relating to or resembling the eye; "ocular muscles"; "an ocular organ"; "ocular diseases"; "the optic (or optical) axis of the eye"; "an ocular spot is a pigmented organ or part believed to be sensitive to light" [syn: ocular, optic, optical, opthalmic]
2: relating to or using sight; "ocular inspection"; "an optical illusion"; "visual powers"; "visual navigation" [syn: ocular, optic, optical, visual] n
1: the organ of sight [syn: eye, oculus, optic]

Merriam Webster's

I. adjective Etymology: Middle English, from Medieval Latin opticus, from Greek optikos, from opsesthai to be going to see; akin to Greek opsis appearance, ?ps eye — more at eye Date: 14th century of or relating to vision or the eye II. noun Date: 1600 1. eye 2. a. any of the elements (as lenses, mirrors, or light guides) of an optical instrument or system — usually used in plural b. an optical instrument

Oxford Reference Dictionary

adj. & n. --adj. of or relating to the eye or vision (optic nerve). --n. 1 a lens etc. in an optical instrument. 2 archaic or joc. the eye. 3 (Optic) Brit. propr. a device fastened to the neck of a bottle for measuring out spirits etc. Phrases and idioms: optic angle the angle formed by notional lines from the extremities of an object to the eye, or by lines from the eyes to a given point. optic axis 1 a line passing through the centre of curvature of a lens or spherical mirror and parallel to the axis of symmetry. 2 the direction in a doubly refracting crystal for which no double refraction occurs. optic lobe the dorsal lobe in the brain from which the optic nerve arises. Etymology: F optique or med.L opticus f. Gk optikos f. optos seen

Webster's 1913 Dictionary

Optic Op"tic, n. [From Optic, a.] 1. The organ of sight; an eye. The difference is as great between The optics seeing, as the object seen. --Pope. 2. An eyeglass. [Obs.] --Herbert.

Webster's 1913 Dictionary

Optic Op"tic, Optical Op"tic*al, a. [F. optique, Gr. ?; akin to ? sight, ? I have seen, ? I shall see, and to ? the two eyes, ? face, L. oculus eye. See Ocular, Eye, and cf. Canopy, Ophthalmia.] 1. Of or pertaining to vision or sight. The moon, whose orb Through optic glass the Tuscan artist views. --Milton. 2. Of or pertaining to the eye; ocular; as, the optic nerves (the first pair of cranial nerves) which are distributed to the retina. See Illust. of Brain, and Eye. 3. Relating to the science of optics; as, optical works. Optic angle (Opt.), the angle included between the optic axes of the two eyes when directed to the same point; -- sometimes called binocular parallax. Optic axis. (Opt.) (a) A line drawn through the center of the eye perpendicular to its anterior and posterior surfaces. In a normal eye it is in the direction of the optic axis that objects are most distinctly seen. (b) The line in a doubly refracting crystal, in the direction of which no double refraction occurs. A uniaxial crystal has one such line, a biaxial crystal has two. Optical circle (Opt.), a graduated circle used for the measurement of angles in optical experiments. Optical square, a surveyor's instrument with reflectors for laying off right angles.

Collin's Cobuild Dictionary

Optic means relating to the eyes or to sight. The reason for this is that the optic nerve is a part of the brain. ADJ: ADJ n see also optics

Soule's Dictionary of English Synonyms

I. n. Eye. II. a.; (also optical) Visual.

Moby Thesaurus

baby blues, banjo eyes, bright eyes, clear eyes, cornea, eye, eyeball, eyelid, goggle eyes, iris, lens, lid, naked eye, nictitating membrane, ocular, oculus, ophthalmic, ophthalmologic, optic nerve, optical, optometrical, orb, organ of vision, peeper, popeyes, pupil, retina, saucer eyes, sclera, seeing, starry orbs, unaided eye, visible, visional, visual, visual organ