/ Dictionary / Index P platinoid: Meaning and Definition of Find definitions for: plat•i•noid Pronunciation: (plat'n-oid"), [key] — adj. resembling platinum: the platinoid elements. —n. any of the metals, as palladium or iridium, with which platinum is commonly associated. an alloy of copper, zinc, and nickel, to which small quantities of such elements as tungsten or aluminum have been added. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. platinocyanide platinotype Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language