■ noun
1》 a precious stone consisting of a clear and colourless crystalline form of pure carbon, the hardest naturally occurring substance.
2》 a figure with four straight sides of equal length forming two opposite acute angles and two opposite obtuse angles; a rhombus.
3》 ( ~s ) one of the four suits in a conventional pack of playing cards, denoted by a red figure of such a shape.
↘a card of this suit.
4》 a baseball field.
5》 a railway crossing in which two tracks cross over each other at an acute angle.
Phrases
~ in the rough North American term for rough ~ .
Derivatives
~iferous -'dɪf(ə)rəs adjective
Origin
ME: from OFr. diamant , from med. L. diamas , diamant- , var. of L. adamans (see adamant ).