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The name is also given to various other plants; as, hemp agrimony (Eupatorium cannabinum); water agrimony (Bidens).

An air sac, sometimes double or variously lobed, in the visceral cavity of many fishes. It originates in the same way as the lungs of air-breathing vertebrates, and in the adult may retain a tubular connection with the pharynx or esophagus.

A receptacle of air in various parts of the system; as, a cell or minute cavity in the walls of the air tubes of the lungs; the air sac of birds; a dilatation of the air vessels in insects.

A compact variety or sulphate of lime, or gypsum, of fine texture, and usually white and translucent, but sometimes yellow, red, or gray. It is carved into vases, mantel ornaments, etc.

composition a silicate of alumina and soda. It is a common constituent of granite and of various igneous rocks. See Feldspar.

ric poet of Mitylene, about 6000 b. c. -- n. A kind of verse, so called from Alcæus. One variety consists of five feet, a spondee or iambic, an iambic, a long syllable, and two dactyls.

A mixed metal composed mainly of brass, formerly used for various utensils; hence, a trumpet. [Obs.] Put to their mouths the sounding alchemy. Milton.

iquid containing it in considerable quantity. It is extracted by simple distillation from various vegetable juices and infusions of a saccharine nature, which have undergone vinous fermentation.

densation of two molecules of acetaldehyde: CH3CHO + CH3CHO = H3CH(OH)CH2CO; also, any of various derivatives of this. The same reaction has been applied, under the name of aldol condensation, to the production of many compounds.

A fixed star, in Medusa's head, in the constellation Perseus, remarkable for its periodic variation in brightness.

Any one of various soils found in arid and semiarid regions, containing an unusual amount of soluble mineral salts which effloresce in the form of a powder or crust (usually white) in dry weather following rains or irrigation. The basis of these salts is mainly soda with a smaller amount of potash, and usually a little…

Variability in chemical constitution without variation in crystalline form.

A variety of pseudomorph which has undergone partial or complete change or substitution of material; -- thus limonite is frequently an allomorph after pyrite. G. H. Williams.

book or table, containing a calendar of days, and months, to which astronomical data and various statistics are often added, such as the times of the rising and setting of the sun and moon, eclipses, hours of full tide, stated festivals of churches, terms of courts, etc. Nautical almanac, an almanac, or year book, con…

The common red variety of garnet.

ake observations of the sun's amplitude at the time of its rising or setting, to find the variation of the compass.

of Peru (Lama paco), having long, fine, wooly hair, supposed by some to be a domesticated variety of the llama.

The quality of being alterable; variableness; alterability.

A variety of shale or clay slate, containing iron pyrites, the decomposition of which leads to the formation of alum, which often effloresces on the rock.

A walk or passage; -- applied to passages of various kinds. The sides of every street were covered with fresh alures of marble. T. Warton.