Dictionary
ar•se•nous
Pronunciation: (är'su-nus), [key]—
adj. Chem.
1. containing arsenic in the trivalent state, as arsenous chloride, AsCl
3.
2. of or derived from arsenous acid.
Also,arsenious.Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.