Platinous
Pronunciation : Plat"i*nous
Part of Speech : a.
Definition : Defn: Of, pertaining to, or containing, platinum; -- used specifically to designate those compounds in which the element has a lower valence, as contrasted with the platinic compounds; as, platinous chloride (PtCl2).
(Chem.)
Source : Webster's Unabridged Dictionary, 1913