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arsenous acid

American  

noun

Chemistry.

  1. a hypothetical acid, H 3 AsO 3 or HAsO 2 , found only in solution or in the form of its salts.

  2. arsenic trioxide.

Etymology

Origin of arsenous acid

First recorded in 1790–1800

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.