a colorless, crystalline, water-soluble, poisonous powder, H2SeO3, used chiefly as a reagent.
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Origin of selenious acid
First recorded in 1825–35
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
British Dictionary definitions for selenious acid
a white soluble crystalline strong dibasic acid analogous to sulphurous acid. Formula: H 2 SeO 3
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012