Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of optical is as below...

Omphaloptic :: Omphaloptic (n.) An optical glass that is convex on both sides.

Eyepiece :: Eyepiece (n.) The lens, or combination of lenses, at the eye end of a telescope or other optical instrument, through which the image formed by the mirror or object glass is viewed..

Chromascope :: Chromascope (n.) An instrument for showing the optical effects of color.

Optical :: Optical (a.) Of or pertaining to vision or sight.

Thaumatrope :: Thaumatrope (n.) An optical instrument or toy for showing the presistence of an impression upon the eyes after the luminous object is withdrawn.

Phantascope :: Phantascope (n.) An optical instrument or toy, resembling the phenakistoscope, and illustrating the same principle; -- called also phantasmascope..

Scoptical :: Scoptical (a.) Jesting; jeering; scoffing.

Megalethoscope :: Megalethoscope (n.) An optical apparatus in which pictures are viewed through a large lens with stereoptical effects. It is often combined with the stereoscope.

Autopsical :: Autopsical (a.) Pertaining to autopsy; autoptical.

Scioptic :: Scioptic (a.) Of or pertaining to an optical arrangement for forming images in a darkened room, usually called scioptic ball..

Sextant :: Sextant (n.) An instrument for measuring angular distances between objects, -- used esp. at sea, for ascertaining the latitude and longitude. It is constructed on the same optical principle as Hadley's quadrant, but usually of metal, with a nicer graduation, telescopic sight, and its arc the sixth, and sometimes the third, part of a circle. See Quadrant..

Aperture :: Aperture (n.) The diameter of the exposed part of the object glass of a telescope or other optical instrument; as, a telescope of four-inch aperture..

Erector :: Erector (n.) An attachment to a microscope, telescope, or other optical instrument, for making the image erect instead of inverted..

Perspectively :: Perspectively (adv.) Optically; as through a glass.

Field :: Field (n.) The space covered by an optical instrument at one view.

Ocular :: Ocular (n.) The eyepiece of an optical instrument, as of a telescope or microscope..

Stereoscopic :: Stereoscope (n.) An optical instrument for giving to pictures the appearance of solid forms, as seen in nature. It combines in one, through a bending of the rays of light, two pictures, taken for the purpose from points of view a little way apart. It is furnished with two eyeglasses, and by refraction or reflection the pictures are superimposed, so as to appear as one to the observer..

Perspective :: Perspective (n.) Of or pertaining to the science of vision; optical.

Define :: Define (v. t.) To determine with precision; to mark out with distinctness; to ascertain or exhibit clearly; as, the defining power of an optical instrument..

Glass :: Glass (v. t.) An optical glass; a lens; a spyglass; -- in the plural, spectacles; as, a pair of glasses; he wears glasses..

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