- containing bivalent platinum.
Origin of platinous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for platinous
A black powder, soluble in excess of alkali, and freely so in the acids, forming brown solutions of the platinous salts.
Platinous oxalate, in fine copper-coloured needles, may be obtained by heating platinic oxide in a solution of oxalic acid.
- of or containing platinum, esp in the divalent state