A white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum.

synonyms: ammonia alum, ammonium alum.

Roget 397: sourness etc. adj.; acid, acidity, low pH; acetous fermentation, lactic fermentation.    vinegar, verjuice^†, crab, alum; acetic acid, lactic acid.    ... show more

A white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum.

synonyms: potash alum, potassium alum.

Polish: ałun, ałun potasowy

A person who has received a degree from a school (high school or college or university).

synonyms: alumna, alumnus, grad, graduate.

Dutch: oud-leerling, afgestudeerde, abituriënt
Polish: absolwent, wychowanek

A double sulphate of aluminum and potassium that is used as an astringent (among other things).

Dutch: aluin