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A small oval porcelain or glass cup, having a rim curved to fit the orbit of the eye. it is used in the application of liquid remedies to eyes; -- called also eyeglass.

The forehead; the part of the cranium between the orbits and the vertex.

A term applied to a lachrymal gland on the inner side of the orbit of many animals which have a third eyelid, or nictitating membrane. See Nictitating membrane, under Nictitate.

about the autumnal equinox, when, by reason of the small angle that is made by the moon's orbit with the horizon, it rises nearly at the same hour for several days. -- Harvest mouse (Zoöl.), a very small European field mouse (Mus minutus). It builds a globular nest on the stems of wheat and other plants. -- Harvest q…

tion, or tipping for pouring. Inclination compass, an inclinometer. -- Inclination of an orbit (Astron.), the angle which the orbit makes the ecliptic. -- Inclination of the needle. See Dip of the needle, under Dip.

; -- called also internal angle. -- Interior planets (Astron.), those planets within the orbit of the earth. -- Interior screw, a screw cut on an interior surface, as in a nut; a female screw.

of the order of the planetary motions, discovered by John Kepler. They are these: (1) The orbit of a planet with respect to the sun is an ellipse, the sun being in one of the foci. (2) The areas swept over by a vector drawn from the sun to a planet are proportioned to the times of describing them. (3) The squares of th…

a) Libration in longitude, that which, depending on the place of the moon in its elliptic orbit, causes small portions near the eastern and western borders alternately to appear and disappear each month.

The cheek bone, which forms a part of the lower edge of the orbit.

stances throughout one revolution of the planet, equivalent to the semi-major axis of the orbit. -- Mean error (Math. Phys.), the average error of a number of observations found by taking the mean value of the positive and negative errors without regard to sign. -- Mean-square error, or Error of the mean square (Math…

Having the orbital index relatively large; having the orbits narrow transversely; -- opposed to microseme.

Having a medium orbital index; having orbits neither broad nor narrow; between megaseme and microseme.

Having the orbital index relatively small; having the orbits broad transversely; -- opposed to Ant: megaseme.

The time occupied by the moon in making one revolution in her orbit; a month. Shak.

on motor nerves (or third pair of cranial nerves) which supply many of the muscles of the orbit. -- n.

The supraorbital point.

Of, pertaining to, or in the region of, the eye; ocular; as the ophthalmic, or orbitonasal, nerve, a division of the trigeminal, which gives branches to the lachrymal gland, eyelids, nose, and forehead. Ophthalmic region (Zoöl.), the space around the eyes.

A circle; esp., a circle, or nearly circular orbit, described by the revolution of a heavenly body; an orbit. The schoolmen were like astronomers, which did feign eccentrics, and epicycles, and such engines of orbs. Bacon. You seem to me as Dian in her orb. Shak. In orbs Of circuit inexpressible they stood, Orb within…

e revolution of balls moved by wheelwork, the relative size, periodic motions, positions, orbits, etc., of bodies in the solar system.

That point, in the real or apparent orbit of one star revolving around another, at which the former is nearest to the latter.