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The upper, contrary-moving current of the atmosphere over a monsoon.

The substance from which attraction spheres develop in mitotic cell division, and of which they consist.

Any place of public contest or exertion; any sphere of action; as, the arenaof debate; the arena of life.

A large constellation in the southern hemisphere, called also Argo Navis. In modern astronomy it is replaced by its three divisions, Carina, Puppis, and Vela.

A substance regarded as an element, contained in the atmosphere and remarkable for its chemical inertness. Rayleigh and Ramsay.

rtaining to, or resembling, a bracelet or ring; consisting of rings or circles. Armillary sphere, an ancient astronomical machine composed of an assemblage of rings, all circles of the same sphere, designed to represent the positions of the important circles of the celestial sphere. Nichol.

from the beginning of Aries, which rises with a star, or other celestial body, in a right sphere; or the arc of the equator intercepted between the first point of Aries and that point of the equator that comes to the meridian with the star; -- expressed either in degrees or in time. -- Oblique ascension (Astron.), an…

(Zoöl.), a large, handsome, red and black butterfly (Danais Archippus), found in both hemispheres. It feeds on plants of the genus Asclepias.

A stereographic projection of the sphere on the plane of a great circle, as the equator, or a meridian; a planisphere. Whewell.

ics of the stars and other heavenly bodies, their chemical constitution, light, heat, atmospheres, etc.

Of or pertaining to the atmosphere; of the nature of, or resembling, the atmosphere; as, atmospheric air; the atmospheric envelope of the earth.

In relation to the atmosphere.

The science or a treatise on the atmosphere.

o become thin, slender, or fine; to grow less; to lessen. The attention attenuates as its sphere contracts. Coleridge.

ting from an electrified body, and forming a mass surrounding it, called the electric atmosphere. See Atmosphere, 2.

The Charioteer, or Wagoner, a constellation in the northern hemisphere, situated between Perseus and Gemini. It contains the bright star Capella.

d or blood color. The Aurora australis (is a corresponding phenomenon in the southern hemisphere, the streams of light ascending in the same manner from near the southern horizon.

The sovereignty of reason in the sphere of morals; or man's power, as possessed of reason, to give law to himself. In this, according to Kant, consist the true nature and only possible proof of liberty. Fleming.

Axis of the equator, ecliptic, horizon (or other circle considered with reference to the sphere on which it lies), the diameter of the sphere which is perpendicular to the plane of the circle. Hutton. -- Axis of the Ionic capital (Arch.), a line passing perpendicularly through the middle of the eye of the volute. --…

Any round or roundish body or mass; a sphere or globe; as, a ball of twine; a ball of snow.