/'plætɪnəm; `plætnəm/
n [U] (chemistry 化) greyish-white metallic element that does not tarnish, used to make jewellery and, esp in alloys with other metals, in industry 铂; 白金
*a sapphire in a platinum setting 白金托镶着的蓝宝石. =>App
10 见附录10.

n[U]
[Date: 1800-1900; Language: Modern Latin;Origin:Spanish platina, from plata; PLATE¹]
a silver-grey metal that does not change colour or lose its brightness, and is used in making expensive jewellery and in industry. It is a chemical element : symbol Pt
　a platinum ring
if a music recording goes platinum, at least a million copies of it have been sold
　Eight of Denver's albums went platinum .
　a platinum disc