Dictionary.net

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.

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.

Noting a chemical compound containing silver in a lower valency, therefore in a larger proportionate amount than an argentic compound.

Containing silver in a relatively greater amount than the ordinary silver compounds.