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A — Apsidal to Arable (Part 4 of 6)

Aquarium
(A*qua"ri*um) n.; pl. E. Aquariums L. Aquaria [L. See Aquarius, Ewer.] An artificial pond, or a globe or tank in which living specimens of aquatic animals or plants are kept.

Aquarius
(||A*qua"ri*us) n. [L. aquarius, adj., relating to water, and n., a water-carrier, fr. aqua. See Aqua.] (Astron.) (a) The Water-bearer; the eleventh sign in the zodiac, which the sun enters about the 20th of January; — so called from the rains which prevail at that season in Italy and the East. (b) A constellation south of Pegasus.

Aquatic
(A*quat"ic) a. [L. aquaticus: cf. F. aquatique. See Aqua.] Pertaining to water; growing in water; living in, swimming in, or frequenting the margins of waters; as, aquatic plants and fowls.

Aquatic
(A*quat`ic), n.

1. An aquatic animal or plant.

2. pl. Sports or exercises practiced in or on the water.

Aquatical
(A*quat"ic*al) a. Aquatic. [R.]

Aquatile
(Aq"ua*tile) a. [L. aquatilis: cf. F. aquatile.] Inhabiting the water. [R.] Sir T. Browne.

Aquatint
(A"qua*tint A`qua*tin"ta) n. [It. acquatinta dyed water; acqua (L. aqua) water + tinto, fem. tinta, dyed. See Tint.] A kind of etching in which spaces are bitten by the use of aqua fortis, by which an effect is produced resembling a drawing in water colors or India ink; also, the engraving produced by this method.

Aqueduct
(Aq"ue*duct) n. [F. aqueduc, OF. aqueduct fr. L. aquaeductus; aquae, gen. of aqua water + ductus a leading, ducere to lead. See Aqua, Duke.]

1. A conductor, conduit, or artificial channel for conveying water, especially one for supplying large cities with water.

The term is also applied to a structure (similar to the ancient aqueducts), for conveying a canal over a river or hollow; more properly called an aqueduct bridge.

2. (Anat.) A canal or passage; as, the aqueduct of Sylvius, a channel connecting the third and fourth ventricles of the brain.

Aqueity
(A*que"i*ty) n. Wateriness. [Obs.]

Aqueous
(A"que*ous) a. [Cf. F. aqueux, L. aquosus, fr. aqua. See Aqua, Aquose.]

1. Partaking of the nature of water, or abounding with it; watery.

The aqueous vapor of the air.
Tyndall.

2. Made from, or by means of, water.

An aqueous deposit.
Dana.

Aqueous extract, an extract obtained from a vegetable substance by steeping it in water. — Aqueous humor (Anat.), one the humors of the eye; a limpid fluid, occupying the space between the crystalline lens and the cornea. (See Eye.) — Aqueous rocks (Geol.), those which are deposited from water and lie in strata, as opposed to volcanic rocks, which are of igneous origin; — called also sedimentary rocks.

Aqueousness
(A`que*ous*ness), n. Wateriness.