argentous

from WordNet (r) 3.0 (2006)

argentous
    adj 1: relating to compounds in which silver is univalent

from The Collaborative International Dictionary of English v.0.48

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.
   [1913 Webster]