alum

noun

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

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

a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum

a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum

Roots

alumenalum- · Latin · astringent mineral salt

Synonyms & related words for alum

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Words related to alum

Explore words related to alum — words associated with it, words that go with it, and its nearest matches in meaning. Related words include alumish, alumna, alumnus, grad, alumnae, alumni, graduate, alumstone. Click any word to make it the center of the map and keep exploring the web of connections.

Where does alum come from?

The word alum breaks down into one root of Latin origin: the root alum, from Latin alumen (“astringent mineral salt”). Explore each root to see other English words built from the same source.