ammonium alum

1. 1.

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

   Synonymsalumammonia alum

   Broaderaluminumdouble salt

Questions about ammonium alum

What does ammonium alum mean?

ammonium alum means "a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum".

What is another word for ammonium alum?

Close synonyms include alum, ammonia alum. Each sense on this page lists its own synonyms, because a word with several meanings rarely has one substitute that works for all of them.

Is ammonium alum a common word?

ammonium alum is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.