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polyacid

[pol-ee-as-id] /ˌpɒl iˈæs ɪd/
adjective
1.
having more than one replaceable hydrogen atom.
2.
capable of reacting with more than one equivalent weight of an acid.
noun
3.
an acid having more than one replaceable hydrogen atom.
4.
an oxyacid containing the equivalent of extra molecules of its anhydride, as the polysulfuric acids, H 2 S 2 O 7 or H 2 SO 4 ⋅SO 3 , and H 2 S 3 O 1 0 or H 2 SO 4 ⋅2SO 3 .
Origin
1855-1860
1855-60; poly- + acid
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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