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arsenous

[ahr-suh-nuh s] /ˈɑr sə nəs/
adjective, Chemistry
1.
containing arsenic in the trivalent state, as arsenous chloride, AsCl 3 .
2.
of or derived from arsenous acid.
Also, arsenious.
Origin of arsenous
1790-1800
1790-1800; arsen- + -ous
Can be confused
arsenous, arsonous.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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