[1] : The Collaborative International Dictionary of English v.0.48

diamond \di"amond\ ?; 277, n. oe. diamaund, diamaunt, f.
   diamant, corrupted, fr. l. adamas, the hardest iron, steel,
   diamond, gr. ?. perh. the corruption is due to the influence
   of gr. ? transparent. see adamant, tame.
   1. a precious stone or gem excelling in brilliancy and
      beautiful play of prismatic colors, and remarkable for
      extreme hardness.
      1913 webster

   note: the diamond is native carbon in isometric crystals,
         often octahedrons with rounded edges. it is usually
         colorless, but some are yellow, green, blue, and even
         black. it is the hardest substance known. the diamond
         as found in nature called a rough diamond is cut, for
         use in jewelry, into various forms with many reflecting
         faces, or facets, by which its brilliancy is much
         increased. see brilliant, rose. diamonds are said
         to be of the first water when very transparent, and of
         the second or third water as the transparency
         decreases.
         1913 webster

   2. a geometrical figure, consisting of four equal straight
      lines, and having two of the interior angles acute and two
      obtuse; a rhombus; a lozenge.
      1913 webster

   3. one of a suit of playing cards, stamped with the figure of
      a diamond.
      1913 webster

   4. arch. a pointed projection, like a four-sided pyramid,
      used for ornament in lines or groups.
      1913 webster

   5. baseball the infield; the square space, 90 feet on a
      side, having the bases at its angles.
      1913 webster

   6. print. the smallest kind of type in english printing,
      except that called brilliant, which is seldom seen.
      1913 webster

   note: hand this line is printed in the type called
         diamond.
         1913 webster

   black diamond, coal; min. see carbonado.

   bristol diamond. see bristol stone, under bristol.

   diamond beetle zool., a large south american weevil
      entimus imperialis, remarkable for its splendid luster
      and colors, due to minute brilliant scales.

   diamond bird zool., a small australian bird pardalotus
      punctatus, family ampelidae.. it is black, with
      white spots.

   diamond drill engin., a rod or tube the end of which is
      set with black diamonds; -- used for perforating hard
      substances, esp. for boring in rock.

   diamond finch zool., a small australian sparrow, often
      kept in a cage. its sides are black, with conspicuous
      white spots, and the rump is bright carmine.

   diamond groove iron working, a groove of v-section in a
      roll.

   diamond mortar chem., a small steel mortar used for
      pulverizing hard substances.

   diamond-point tool, a cutting tool whose point is
      diamond-shaped.

   diamond snake zool., a harmless snake of australia
      morelia spilotes; the carpet snake.

   glazier's diamond, a small diamond set in a glazier's tool,
      for cutting glass.
      1913 webster
see also:
adamant tame brilliant rose diamond black diamond 
carbonado bristol diamond bristol stone bristol diamond beetle 
entimus imperialis diamond bird pardalotus punctatus ampelidae diamond drill 
diamond finch diamond groove diamond mortar diamond-point tool diamond snake 
morelia spilotes glazier's diamond 

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