polyacid adjective & noun. [pɒlɪ'asɪd] M19.
[from POLY- + ACID adjective, noun.]
Chemistry.
A. adjective.
1. Of a base: (composed of molecules) able to combine with more than one monovalent acid radical. Now rare. M19.

2. Of the nature of or pertaining to a polyacid. M20.
b. noun. A compound with more than one acidic group; esp. an acid containing polymeric anions. E20.

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