Part 203

||A*lu"men (&?;), n. [L.] (Chem.) Alum.

A*lu"mi*na (&?;), n. [L. alumen, aluminis. See Alum.] (Chem.) One of the earths, consisting of two parts of aluminium and three of oxygen, Al2O3.

It is the oxide of the metal aluminium, the base of aluminous salts, a constituent of a large part of the earthy siliceous minerals, as the feldspars, micas, scapolites, etc., and the characterizing ingredient of common clay, in which it exists as an impure silicate with water, resulting from the decomposition of other aluminous minerals. In its natural state, it is the mineral corundum.

A*lu`mi*nate (&?;), n. (Chem.) A compound formed from the hydrate of aluminium by the substitution of a metal for the hydrogen.

A*lu"mi*na`ted (&?;). a. Combined with alumina.

Al"u*mine (l"*mn), n. [F.] Alumina. Davy.

Al`u*min"ic (l`*mn"l), a. Of or containing aluminium; as, aluminic phosphate.

A*lu`mi*nif"er*ous (&?;), a. [L. alumen alum + -ferous: cf. F. aluminifère.] Containing alum.

A*lu"mi*ni*form (&?;), a. [L. alumen + -form.] Having the form of alumina.

Al`u*min"i*um (l`*mn"*m), n. [L. alumen. See Alum.] (Chem.) The metallic base of alumina. This metal is white, but with a bluish tinge, and is remarkable for its resistance to oxidation, and for its lightness, having a specific gravity of about 2.6. Atomic weight 27.08. Symbol Al.

Aluminium bronze or gold, a pale gold-colored alloy of aluminium and copper, used for journal bearings, etc.

A*lu"mi*nize (*l*m*nz), v. t. To treat or impregnate with alum; to alum.

A*lu"mi*nous (*l*m*ns), a. [L. aluminosus, fr. alumen alum: cf. F. alumineux.] Pertaining to or containing alum, or alumina; as, aluminous minerals, aluminous solution.

A*lu"mi*num (*l*m*nm), n. See Aluminium.

Al"um*ish (&?;), a. Somewhat like alum.

||A*lum"na (&?;), n. fem.; pl. Alumnæ (&?;) . [L. See Alumnus.] A female pupil; especially, a graduate of a school or college.

||A*lum"nus (&?;), n.; pl. Alumni (&?;). [L., fr. alere to nourish.] A pupil; especially, a graduate of a college or other seminary of learning.

Al"um root` (&?;). (Bot.) A North American herb (Heuchera Americana) of the Saxifrage family, whose root has astringent properties.

{ Al"um schist" (&?;), Al"um shale" (&?;), } (Min.) 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.

Al"um stone` (&?;). (Min.) A subsulphate of alumina and potash; alunite.

Al"u*nite (&?;), n. (Min.) Alum stone.

A*lu"no*gen (&?;), n. [F. alun alum + -gen.] (Min.) A white fibrous mineral frequently found on the walls of mines and quarries, chiefly hydrous sulphate of alumina; -- also called feather alum, and hair salt.

Al"ure (&?;), n. [OF. alure, aleure, walk, gait, fr. aler (F. aller) to go.] A walk or passage; -- applied to passages of various kinds.

The sides of every street were covered with fresh alures of marble. T. Warton.

Al"u*ta"ceous (&?;), a. [L. alutacius, fr. aluta soft leather.] 1. Leathery.

2. Of a pale brown color; leather-yellow. Brande.

Al`u*ta"tion (&?;), n. [See Alutaceous.] The tanning or dressing of leather. [Obs.] Blount.

Al"ve*a*ry (&?;), n.; pl. Alvearies (&?;). [L. alvearium, alveare, beehive, fr. alveus a hollow vessel, beehive, from alvus belly, beehive.] 1. A beehive, or something resembling a beehive. Barret.