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metabisulfite

noun meta·bi·sul·fite
variants: or chiefly British

metabisulphite

\-ˌbī-ˈsəl-ˌfīt\play

Medical Definition of metabisulfite

  1. :  a salt containing the bivalent anion S2O52− obtained by heating a bisulfite—see sodium metabisulfite

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