n diamond

World English Dictionary
diamond (ˈdaɪəmənd)
1.  a.  a colourless exceptionally hard mineral (but often tinted yellow, orange, blue, brown, or black by impurities), found in certain igneous rocks (esp the kimberlites of South Africa). It is used as a gemstone, as an abrasive, and on the working edges of cutting tools. Composition: carbon. Formula: C. Crystal structure: cubic
 b.  (as modifier): a diamond ring Related: diamantine
2.  geometry
 a.  a figure having four sides of equal length forming two acute angles and two obtuse angles; rhombus
 b.  (modifier) rhombic
3.  a.  a red lozenge-shaped symbol on a playing card
 b.  a card with one or more of these symbols or (when plural) the suit of cards so marked
4.  baseball
 a.  the whole playing field
 b.  the square formed by the four bases
5.  (formerly) a size of printer's type approximately equal to 4½ point
6.  black diamond a figurative name for coal
7.  rough diamond
 a.  an unpolished diamond
 b.  a person of fine character who lacks refinement and polish
8.  (tr) to decorate with or as with diamonds
Related: diamantine
[C13: from Old French diamant, from Medieval Latin diamas, modification of Latin adamas the hardest iron or steel, diamond; see adamant]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin & History

early 14c., from O.Fr. diamant, from M.L. diamantem (nom. diamas), from V.L. *adiamantem (altered by infl. of the many Gk. words in dia-), from L. adamantem (nom. adamans) "the hardest metal," later, "diamond" (see adamant). Playing card suit is from 1590s; Sense in baseball is Amer.Eng. 1875.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
diamond   (dī'ə-mənd)  Pronunciation Key 
A form of pure carbon that occurs naturally as a clear, cubic crystal and is the hardest of all known minerals. It often occurs as octahedrons with rounded edges and curved surfaces. Diamond forms under conditions of extreme temperature and pressure and is most commonly found in volcanic breccias and in alluvial deposits. Poorly formed diamonds are used in abrasives and in industrial cutting tools.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Bible Dictionary

Diamond definition

(1.) A precious gem (Heb. yahalom', in allusion to its hardness), otherwise unknown, the sixth, i.e., the third in the second row, in the breastplate of the high priest, with the name of Naphtali engraven on it (Ex. 28:18; 39:11; R.V. marg., "sardonyx.") (2.) A precious stone (Heb. shamir', a sharp point) mentioned in Jer. 17:1. From its hardness it was used for cutting and perforating other minerals. It is rendered "adamant" (q.v.) in Ezek. 3:9, Zech. 7:12. It is the hardest and most valuable of precious stones.

Easton's 1897 Bible Dictionary
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