Dictionary.net

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).

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).

Containing plat inum as a bivalent radicle.