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ial one, as the sun, a planet, or the earth. Of celestial bodies, first the sun, A mighty sphere, he framed. Milton.

The atmosphere. [R.]

-- applied also to the gaseous envelope of any celestial orb, or other body; as, the atmosphere of Mars.

The central mass of the aster in mitotic cell division; centrosphere.

The heavy interior portion of the earth, within the lithosphere.

The hollow globe or sphere formed by the arrangement of the blastomeres on the periphery of an impregnated ovum.

The nucleus or central part of the earth, forming most of its mass; -- disting. from lithosphere, hydrosphere, etc.

A chromosphere. [R.]

An atmosphere of rare matter, composed principally of incandescent hydrogen gas, surrounding the sun and enveloping the photosphere. Portions of the chromosphere are here and there thrown up into enormous tongues of flame.

A small, rounded, marine organism, capable of braking up into coccoliths.

An apparattus for showing the position of the earth, at any given time, with respect to the fixed stars. It consist of a hollow glass globe, on which are depicted the stars and constellations, and within which is a terrestrial globe.

To place in a sphere; to envelop. His ample shoulders in a cloud ensphered. Chapman.

A half sphere; one half of a sphere or globe, when divided by a plane passing through its center.

The aqueous vapor of the entire atmosphere.

To place in, or as in, an orb a sphere. Cf. Ensphere. Bright aërial spirits live insphered In regions mild of calm and serene air. Milton.

The inner corona. [R.]

The solid earth as distinguished from its fluid envelopes, the hydrosphere and atmosphere.

An unfertilized, rounded mass of protoplasm, produced in an oögonium.

A sphere of light; esp., the luminous envelope of the sun.

The representation of the circles of the sphere upon a plane; especially, a representation of the celestial sphere upon a plane with adjustable circles, or other appendages, for showing the position of the heavens, the time of rising and setting of stars, etc., for any given date or hour.