ETYM Latin alumen. Related to Alum.
The metallic base of alumina. The metal is white, but with a bluish tinge, and is remarkable for its resistance to oxidation, and for its lightness, pertaining a specific gravity of about 2.6. Atomic weight 27.08. Symbol Al.
Élément atomique : métal blanchâtre, très léger mais très fort, assez répandu dans la nature.