polyphosphoric acid

1. 1.

   a series of oxyacids of phosphorus

   Broaderoxyacid

   Narrowermetaphosphoric acidpyrophosphoric acid

Questions about polyphosphoric acid

What does polyphosphoric acid mean?

polyphosphoric acid means "a series of oxyacids of phosphorus".

Is polyphosphoric acid a common word?

polyphosphoric acid 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.