The Collaborative International Dictionary
Argentous
Argentous \Ar*gen"tous\, a. (Chem.) Of, pertaining to, or containing, silver; -- said of certain silver compounds in which silver has a higher proportion than in argentic compounds; as, argentous chloride.
Wiktionary
argentous
a. 1 Of, pertaining to(,) or containing silver. 2 (context chemistry English) Of certain compounds, containing silver in a higher proportion than in argentic compounds.
WordNet
argentous
adj. relating to compounds in which silver is univalent