from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Of or relating to the eye or vision.
- adj. Of or relating to the science of optics or optical equipment.
- n. An eye.
- n. Any of the lenses, prisms, or mirrors of an optical instrument.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Of, or relating to the eye or to vision.
- adj. Of, or relating to optics or optical instruments.
- n. An eye.
- n. A lens or other part of an optical instrument that interacts with light.
- n. A measuring device with a small window, attached to an upside-down bottle, used to dispense alcoholic drinks in a bar.
from the GNU version of the Collaborative International Dictionary of English
- n. The organ of sight; an eye.
- n. An eyeglass.
- adj. Of, pertaining to, or using vision or sight.
- adj. Of or pertaining to the eye; ocular. See Illust. of Brain, and Eye.
- adj. Relating to the science of optics or to devices designed to assist vision.
from The Century Dictionary and Cyclopedia
- Relating or pertaining to vision or sight; visual; subservient to the faculty or function of seeing.
- Of or pertaining to the eye as the organ of vision; ocular; ophthalmic.
- Relating to the science of optics.
- The angle which the visual axes of the eyes make with one another as they tend to meet at some distance before the eyes.
- The angle between the optic axes in a biaxial crystal.
- The line in a doubly refracting crystal in the direction of which no double refraction occurs. Crystals belonging to the tetragonal and hexagonal systems have a single optic axis, coincident with their vertical crystallographical axis: hence they are said to be uniaxial. Crystals belonging to the orthorhombic, monoclinic, and triclinic systems have two optic axes, and hence are biaxial.
- Synonyms Optic, Optical. The former is chiefly said of the anatomy of the eye and of the physiology of vision, the latter chiefly of the science of optics: as, optic nerve, tract, lobe; optical angle, center, effect.
- n. The eye.
- n. An eye-glass; a magnifying glass.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. relating to or using sight
- n. the organ of sight
- adj. of or relating to or resembling the eye
Middle English optik, from Old French optique, from Medieval Latin opticus, from Greek optikos, from optos, visible; see okw- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Medieval Latin opticus, from Ancient Greek ὀπτικός (optikos, "of seeing"). (Wiktionary)