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[pol-ee-as-id] /ˌpɒl iˈæs ɪd/ Chemistry

having more than one replaceable hydrogen atom.
capable of reacting with more than one equivalent weight of an .
an having more than one replaceable hydrogen atom.
an oxyacid containing the equivalent of extra molecules of its anhydride, as the polysulfuric , 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 .


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