About The Word Alum

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Alum

Alum Meaning & Definition
Alum Definition And Meaning

What's The Definition Of Alum?

[n] a double sulphate of aluminum and potassium that is used as an astringent (among other things)
[n] a person who has received a degree from a school (high school or college or university)
[n] a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum
[n] a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum

Synonyms | Synonyms for Alum: alumna | alumnus | ammonia alum | ammonium alum | grad | graduate | potash alum | potassium alum

Related Terms | Find terms related to Alum:

See Also | Al | aluminium | aluminum | astringent | astringent drug | atomic number 13 | old boy | scholar | scholarly person | student | styptic

Alum In Webster's Dictionary

\Al"um\, n. [OE. alum, alom, OF. alum, F. alun, fr. L. alumen alum.] (Chem.) A double sulphate formed of aluminium and some other element (esp. an alkali metal) or of aluminium. It has twenty-four molecules of water of crystallization. Note: Common alum is the double sulphate of aluminium and potassium. It is white, transparent, very astringent, and crystallizes easily in octahedrons. The term is extended so as to include other double sulphates similar to alum in formula.
\Al"um\, v. t. To steep in, or otherwise impregnate with, a solution of alum; to treat with alum. --Ure.

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