n. [ L. alumen, aluminis. See Alum. ] (Chem.) One of the earths, consisting of two parts of aluminium and three of oxygen,
☞ 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. [ 1913 Webster ]
n. (Chem.) A compound formed from the hydrate of aluminium by the substitution of a metal for the hydrogen. [ 1913 Webster ]
a. Combined with alumina. [ 1913 Webster ]
n. [ F. ] Alumina. Davy. [ 1913 Webster ]
a. Of or containing aluminium;
a. [ L. alumen alum + -ferous: cf. F. aluminifère. ] Containing alum. [ 1913 Webster ]
a. [ L. alumen + -form. ] Having the form of alumina. [ 1913 Webster ]
n. [ L. alumen. See Alum. ] (Chem.) same as aluminum, chiefly British in usage. [ 1913 Webster ]
Aluminium bronze or
gold
v. t. To treat or impregnate with alum; to alum. [ 1913 Webster ]
n. [ Alumin-ium + -graphy. ] Art or process of producing, and printing from, aluminium plates, after the manner of ordinary lithography. --
a. [ L. aluminosus, fr. alumen alum: cf. F. alumineux. ] Pertaining to or containing alum, or alumina;
n. The metallic element forming the 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. Also called
prop. n. [ a trademark. ] an aluminum-based alloy which is both light and strong, containing 4 per cent of copper and 0.5 per cent of magnesium and smaller amounts of iron, manganese, and silicon. It hardens with aging at room temperature. [ WordNet 1.5 +PJC ]
n. [ Skr. ēka one + E. aluminium. ] (Chem.) The name given by