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hydrosulfite

or hy·dro·sul·phite

[hahy-druh-suhl-fahyt]
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noun Chemistry.
  1. hyposulfite(def 1).
  2. sodium hydrosulfite.
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Origin of hydrosulfite

First recorded in 1860–65; hydrosulf(urous) + -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018