Phrase guide
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
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noun
alum, hydrated potassium aluminium sulphate, formula K2SO4.Al2(SO4)3.24H2O
Definition source: English Wiktionary via Wiktextract
Usage: uncountable
No example sentence was provided for this meaning.
Synonyms: none provided
Antonyms: none provided
noun
a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
Synonyms: alum, potassium alum
Antonyms: none provided
Broader terms: aluminum, aluminium, Al, atomic number 13, double salt
History
From potash + alum.
