Meaning Of The Word Alum

Real Dictionary

What's the definition of Alum? Find Alum meanings, definitions and more at the Real Dictionary online.

Alum Meaning

Alum Definition
Alum Definition

What's The Definition Of Alum?

alum
countable noun: An alum is the same as an alumnus.

alum in American English 1
a double sulfate of a monovalent metal or radical (as sodium, potassium, or ammonium) with a trivalent metal (as aluminum, iron, or chromium): it is used as an astringent, as an emetic, and in the manufacture of baking powders, dyes, and paper: the common
noun: a crystalline solid, aluminum potassium sulfate, K2SO4⋅Al2(SO4)3⋅24H2O, used in medicine as an astringent and styptic, in dyeing and tanning, and in many technical processes

alum in American English 2
an alumnus or alumna
noun: an alumna or alumnus

alum in British English 1
noun: a colourless soluble hydrated double sulphate of aluminium and potassium used in the manufacture of mordants and pigments, in dressing leather and sizing paper, and in medicine as a styptic and astringent. Formula: K2SO4.Al2(SO4)3.24 H2 O

alum in British English 2
noun: an alumnus or alumna

alum. in American English
abbreviation: aluminum

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