alum

¹al·um

noun \ˈa-ləm\

Definition of ALUM

1

: a potassium aluminum sulfate KAl(SO₄)₂·12H₂O or an ammonium aluminum sulfate NH₄Al(SO₄)₂·12H₂O used especially as an emetic and as an astringent and styptic

2

: any of various double salts isomorphous with potassium aluminum sulfate

3

: aluminum sulfate

Origin of ALUM

Middle English, from Anglo-French alum, alun, from Latin alumen

First Known Use: 14th century

Other Chemical Engineering Terms

alkali, cation, decant, hygroscopic, isotope, oxidize, slurry, solute, viscous

Rhymes with ALUM

aplomb, bass drum, bay rum, beach plum, become, benumb, degum, dim sum, dumdum, dum-dum, eardrum, far from, green thumb, hail from, ho-hum, how come, humdrum, income, in sum, outcome, pond scum, side drum, snare drum, sour gum, steel drum, subgum, succumb, sweet gum, therefrom, to come, Tom Thumb, tom-tom, wherefrom, yum-yum