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Looking obliquely. Specifically (Med.), not having the optic axes coincident; -- said of the eyes. See Squint, n., 2.

Microscope stand, the instrument, excepting the eyepiece, objective, and other removable optical parts. -- Stand of ammunition, the projectile, cartridge, and sabot connected together. -- Stand of arms. (Mil.) See under Arms. -- Stand of colors (Mil.), a single color, or flag. Wilhelm (Mil. Dict.) -- To be at a sta…

An optical instrument used in determining the position of the planes of light-vibration in sections of crystals.

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 sup…

The diaphragm used in optical instruments to cut off the marginal portions of a beam of light passing through lenses.

An affection of one or both eyes, in which the optic axes can not be directed to the same object, -- a defect due either to undue contraction or to undue relaxation of one or more of the muscles which move the eyeball; squinting; cross-eye.

An optical toy similar to the phenakistoscope. See Phenakistoscope.

Situated under the optic thalamus.

or inside a sheath or vaginal membrane; as, the subvaginal, or subdural, spaces about the optic nerve.

Any one of the authors of the three synoptic Gospels, which give a history of our Lord's life and ministry, in distinction from the writer of John's Gospel, which gives a fuller record of his teachings.

An optical instrument used in viewing distant objects, as the heavenly bodies.

of special days, designated by scientists of different nations or stations, for making synoptic magnetic, meteorological, or other physical observations.

e sacrament according to the usage of the Church of England. Blackstone. -- Test object (Optics), an object which tests the power or quality of a microscope or telescope, by requiring a certain degree of excellence in the instrument to determine its existence or its peculiar texture or markings. -- Test paper. (a) (C…

mass of nervous matter on either side of the third ventricle of the brain; -- called also optic thalamus.

An optical instrument or toy for showing the presistence of an impression upon the eyes after the luminous object is withdrawn.

A telescope. "Glazed optic tube." Milton.

Having but one optic axis, or line of no double refraction.

g rays would meet if not reflected or refracted before they reach it. -- Virtual image. (Optics) See under Image. -- Virtual moment (of a force) (Mech.), the product of the intensity of the force multiplied by the virtual velocity of its point of application; -- sometimes called virtual work. -- Virtual velocity (Me…

a result of the stimulating action of light on the sensitive retina, an expansion of the optic nerve.

An optical toy, in which figures made to revolve on the inside of a cylinder, and viewed through slits in its circumference, appear like a single figure passing through a series of natural motions as if animated or mechanically moved.