simple past tense and past participle of alum

An astringent salt, usually occurring in the form of pale crystals, much used in the dyeing and tanning trade and in certain medicines, and now understood to be a double sulphate of potassium and aluminium (K₂SO₄·Al₂(SO₄)₃·24H₂O).

(transitive) To steep in, or otherwise impregnate with, a solution of alum; to treat with alum.

(shortening, Canada, US) A past attendee or graduate (of either gender) of a college, university or other educational institution.

plural of alum

present participle of alum

The treatment of a material with a solution of alum

(rare, inorganic chemistry) aluminic

Of or relating to a language family of central Nigeria, comprising Alumu, Toro, Sambe, and Hasha.

plural of aluming