polyacid

American  

[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.

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noun

1. an acid having more than one replaceable hydrogen atom.

2. 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 .

Etymology

Origin of polyacid

First recorded in 1855–60; poly- + acid