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Definitions for Alum

[1] Also called potash alum, potassium alum. a crystalline solid, aluminum potassium sulfate, K2 SO4 ⋅Al2 (SO4 )3 ⋅24H2 O, used in medicine as an astringent and styptic, in dyeing and tanning, and in many technical processes.
[2] one of a class of double sulfates analogous to the potassium alum, as aluminum ammonium sulfate, having the general formula R2 SO4 ⋅X2 (SO4 )3 ⋅24H2 O, where R is a univalent alkali metal or ammonium, and X one of a number of trivalent metals.
[3] (not in technical use) aluminum sulfate.
[4] an alumna or alumnus.
[5] aluminum.
[6] Also called: potash alum 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: K 2 SO 4 .Al 2 (SO 4 ) 3 .24H 2 O
[7] any of a group of isomorphic double sulphates of a monovalent metal or group and a trivalent metal. Formula: X 2 SO 4 .Y 2 (SO 4 ) 3 .24H 2 O, where X is monovalent and Y is trivalent

Words related to Alum

alumna, recipient, doctor, grad, alumnus, postgraduate, product, bachelor, master, holder, baccalaureate, Ph.D., diplomate, licentiate, collegian

Words nearby Alum

altruistic, altus, alu, aludel, alula, alum, alum rock, alum., alumin-, alumina, alumina cement

Origin of Alum

2by shortening

Words that may be confused with Alum

alum, alumna, alumnae, alumni, alumnus, (see, usage, note, at, alumnus)

Word origin for Alum

C14: from Old French, from Latin alūmen

Synonyms for Alum

alumna, postgraduate, old grad