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The quality or state of being valid.

Pertaining to, or designating, either one of two distinct acids which are derived from xylic acid and related compounds, and are metameric with uvitic acid.

Any one of six metameric hydrocarbons, (CH3)2.C6H3.NH2, resembling aniline, and related to xylene. They are liquids, or easily fusible crystalline substances, of which three are derived from metaxylene, two from orthoxylene, and one from paraxylene. They are called the amido xylenes.

culating table or frame; an instrument for performing arithmetical calculations by balls sliding on wires, or counters in grooves, the lowest line representing units, the second line, tens, etc. It is still employed in China.

A group of annelids, so called because the species composing it have no special organs of respiration.

parated from a complex object, or from other ideas which naturally accompany it; as the solidity of marble when contemplated apart from its color or figure. -- Abstract terms, those which express abstract ideas, as beauty, whiteness, roundness, without regarding any object in which they exist; or abstract terms are th…

bation, favor, or assent; eager expression of approval; loud applause. On such a day, a holiday having been voted by acclamation, an ordinary walk would not satisfy the children. Southey.

retion; coherence of separate particles; as, the accretion of particles so as to form a solid mass.

A white crystalline solid, from ammonia by replacement of an equivalent of hydrogen by acetyl.

To own as genuine; to assent to, as a legal instrument, to give it validity; to avow or admit in legal form; as, to acknowledgea deed.

A declaration or avowal of one's own act, to give it legal validity; as, the acknowledgment of a deed before a proper officer. Also, the certificate of the officer attesting such declaration. Acknowledgment money, in some parts of England, a sum paid by copyhold tenants, on the death of their landlords, as an acknowled…

Received as true or valid; acknowledged. -- Ad*mit"ted*ly adv.

To raise; to elevate. [Archaic] They . . . advanced their eyelids. Shak.

The act of becoming aërified, or of changing from a solid or liquid form into an aëriform state; the state of being aëriform.

The science of gliding and soaring flight.

rationale of our passions seems to me very necessary for all who would affect them upon solid and pure principles.

A genus of plants (order Amaryllidaceæ) of which the chief species is the maguey or century plant (A. Americana), wrongly called Aloe. It is from ten to seventy years, according to climate, in attaining maturity, when it produces a gigantic flower stem, sometimes forty feet in height, and perishes. The fermented juice…

Erected in the air; having no solid foundation; chimerical; as, an air-built castle.

Without reality; having no solid foundation; empty; trifling; visionary. "Airy fame." Shak. Empty sound, and airy notions. Roscommon.

eggs and of the serum of blood, and is found in other animal substances, both fluid and solid, also in many plants. It is soluble in water is coagulated by heat ad by certain chemical reagents. Acid albumin, a modification of albumin produced by the action of dilute acids. It is not coagulated by heat. -- Alkali album…