Iridium

[ɪ'rɪdɪəm;aɪ-] or [ɪ'rɪdɪəm]

解释:

(noun.) a heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium.

朱厄尔录入--From WordNet

解释:

(n.) A rare metallic element, of the same group as platinum, which it much resembles, being silver-white, but harder, and brittle, and indifferent to most corrosive agents. With the exception of osmium, it is the heaviest substance known, its specific gravity being 22.4. Symbol Ir. Atomic weight 192.5.

达伦编辑

解释:

n. the most infusible and one of the heaviest of the metals found associated with the ore of platinum so called from the iridescence of some of its solutions.—n. Iridos′mium a native compound of iridium and osmium used for pointing gold pens.

校对:朱莉娅