platinum /'plaetinam; 'plsstnsm/ n [U] grey un-tarnishable metal (symbol Pt) used for jewellery and alloyed with other metals for use in industry. 鎖; 白金 (符號(hào)為 Pt) 。 ~ 'blonde, (colloq) woman with silvery-white hair (but not used of a hair that has turned white with age) 、 (俗) 銀白色陰發(fā)的女人 (非指因年老而頭發(fā)變白者) 。