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ypothetical upper, purer air, or to the higher regions beyond the earth or beyond the atmosphere; celestial; as, ethereal space; ethereal regions. Go, heavenly guest, ethereal messenger. Milton.

ust pipe (Steam Engine), the pipe that conveys exhaust steam from the cylinder to the atmosphere or to the condenser. Exhaust port (Steam Engine), the opening, in the cylinder or valve, by which the exhaust steam escapes. -- Exhaust purifier (Milling), a machine for sorting grains, or purifying middlings by an exhaust…

opposed to Ant: contract; as, to expand the chest; heat expands all bodies; to expand the sphere of benevolence.

To enlarge; to widen; to carry out further; as, to extend the capacities, the sphere of usefulness, or commerce; to extend power or influence; to continue, as time; to lengthen; to prolong; as, to extend the time of payment or a season of trail.

large; broad; wide; comprehensive; as, an extensive farm; an extensive lake; an extensive sphere of operations; extensive benevolence; extensive greatness.

pertaining to that which is external; -- opposed to interior; as, the exterior part of a sphere. Sith nor the exterior nor the inward man Resemble that it was. Shak.

ining spots on the surface of the sun which are brighter than the other parts of the photosphere. They are generally seen in the neighborhood of the dark spots, and are supposed to be elevated portions of the photosphere. Newcomb.

ing star. (Astron.) See Shooting star. -- Falling stone, a stone falling through the atmosphere; a meteorite; an aërolite. -- Falling tide, the ebb tide. -- Falling weather, a rainy season. [Colloq.] Bartlett.

The orb of the fixed stars; the most rmote of the celestial spheres.

ectly from the first or original source; hence, without the intervention of an agent. One sphere there is . . . where the apprehension of him is first-hand and direct; and that is the sphere of our own mind. J. Martineau.

Watery vapor condensed in the lower part of the atmosphere and disturbing its transparency. It differs from cloud only in being near the ground, and from mist in not approaching so nearly to fine rain. See Cloud.

Filled or abounding with fog, or watery exhalations; misty; as, a foggy atmosphere; a foggy morning. Shak.

A thinking or planning beforehand; prescience; premeditation; forecast; provident care. A sphere that will demand from him forethought, courage, and wisdom. I. Taylor.

e who speculates or forms opinions independently of the authority of others; esp., in the sphere or religion, one who forms opinions independently of the authority of revelation or of the church; an unbeliever; -- a term assumed by deists and skeptics in the eighteenth century. Atheist is an old-fashioned word: I'm a f…

-- Frost smoke, an appearance resembling smoke, caused by congelation of vapor in the atmosphere in time of severe cold. The brig and the ice round her are covered by a strange black obscurity: it is the frost smoke of arctic winters. Kane. -- Frost valve, a valve to drain the portion of a pipe, hydrant, pump, etc., wh…

rigin in the invagination or pushing in of the wall of the planula or blastula (the blastosphere) on one side, thus giving rise to a double-walled sac, with one opening or mouth (the blastopore) which leads into the cavity (the archenteron) lined by the inner wall (the hypoblast). See Illust. under Invagination. In a m…

as, the generation of a line or curve by the motion of a point, of a surface by a line, a sphere by a semicircle, etc.

the geocentric latitude by reason of the difference between the earth's figure and a true sphere. -- Geographical mile. See under Mile. -- Geographical variation, any variation of a species which is dependent on climate or other geographical conditions.

operties of straight lines, circles, plane surface, solids bounded by plane surfaces, the sphere, the cylinder, and the right cone. -- Higher geometry, that pert of geometry which treats of those properties of straight lines, circles, etc., which are less simple in their relations, and of curves and surfaces of the se…

he modern temperate regions was polar, and ice covered large portions of the northern hemisphere to the mountain tops. -- Glacial theory or hypothesis. (Geol.) See Glacier theory, under Glacier.