"A compound or salt in which alumina or aluminium hydroxide is combined with an alkali or base. Also: any of various oxyanions or hydroxy anions of aluminium; a compound containing such an anion", Early 19th cent. From alumina + -ate, apparently after Swedish aluminiat.[aluminate etymology, aluminate origin, 英语词源]
"To coat or cover with aluminium; to treat or cause to react with aluminium; to introduce aluminium into", 1930s; earliest use found in Science News. From alumin- + -ate, probably after aluminated.