[plat-n-i-rid-ee-uh m, -ahy-rid-] /ˌplæt n ɪˈrɪd i əm, -aɪˈrɪd-/ noun 1. a natural alloy composed chiefly of and . /ˌplætɪnɪˈrɪdɪəm/ noun 1. any alloy of platinum and iridium: used in jewellery, electrical contacts, and hypodermic needles
[plat-n-ahyt] /ˈplæt nˌaɪt/ Trademark. 1. a brand name for an alloy of about 55 percent iron and 45 percent nickel, having the same coefficient of expansion as platinum and used as a substitute for platinum in electrical work.
[plat-n-ahyz] /ˈplæt nˌaɪz/ verb (used with object), platinized, platinizing. 1. to coat or plate with metallic . /ˈplætɪˌnaɪz/ verb 1. (transitive) to coat with platinum
1. a combining form representing in compound words: platinocyanic. combining form 1. of, relating to, containing, or resembling platinum: platinotype