Толковый словарь английского языка Oxford English Reference - optic

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