Aluminium \Al`u*min"i*um\ ([a^]l`[-u]*m[i^]n"[i^]*[u^]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.

Source: Webster's Revised Unabridged Dictionary (1913)