Alum

aKum, n. A double sulphate of alumina and pota a. [L. alumen.] — Aluminate, a-lu'ml-nat, v. (Engraving.) To wash with alum-water, to prevent lines from running.—Aluminlform, n. Formed like alumina. — Alu'mina, -ml-na, AFumine, -min, n. (Min.) One of the earths, having two parts of aluminum and three of oxygen.— Aluminiferous, -nif'er-us, a. Producing or containing alum. — Aluminium, Alu'minum, n. The metallic base of alumina; a very light white metal, not easily oxidized. — Alu'mino us, a. Pert, to, or containing alum, or alumina. — Al'umish, n. Of the nature of alum.—Al'um-stone, n. A mineral containing alum.