platinous
/ˈplatɪnəs/ /ˈplat(ə)nəs/Chemistry
adjective
Of or containing platinum, especially in the divalent state.
Origin
Mid 19th century. From platinum + -ous, after post-classical Latin platinosus. Compare French platineux (1842 in oxyde platineux; probably after Berzelius's post-classical Latin oxydum platinosum.