Entry 2 senses · 2 variants Webster, 1913 Platinoid · Plat·i·noid · IPA a. n. 01 a. Resembling platinum. 1. Resembling platinum. 02 n. An alloy of German silver containing tungsten; -- used for forming electrical resistance coils and standards. 1. An alloy of German silver containing tungsten; -- used for forming electrical resistance coils and standards.(Chem.)