diamond
/ˈdaɪəmənd; `daɪəmənd/ n
1
(a) [U, C] transparent precious stone of pure carbon in crystallized form, the hardest substance known 金刚石; 金刚钻; 钻石
a ring with a diamond in it 钻石戒指
[attrib 作定语]
a diamond ring, necklace, etc 钻石戒指、 项链等.
(b) [C] piece of this (often artificially made) used in industry, esp for cutting glass or as a stylus for playing records （常为人造的）工业用金刚石; （尤指）金刚石玻璃刀, 宝石唱针.
2 [C] figure with four equal sides and with angles that are not right angles 菱形.
3
(a) diamonds [sing or pl v]
suit of playing-cards marked with red diamond shapes 红方块花色的纸牌
the five of diamonds 方块五
Diamonds is/are trumps. 方块为王牌.
(b) [C] playing-card of this suit 方块牌
play a diamond 出一张方块. =>illus at playing-card 见playing-card之插图.
4 [C] (in baseball) space inside the lines connecting the bases （棒球）内野（四垒连线内的场地）.
5 (idm 习语) a rough diamond => rough1.