diamondnoun
uk/ˈdaɪə.mənd/us/ˈdaɪ.ə.mənd//ˈdaɪ.mənd/diamond noun (STONE)
B2 [ C or U ] a transparent, extremely hard precious stone that is used in jewellery, and in industry for cutting hard things:
jewellery made from diamonds:
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- The large central diamond is surrounded by eight smaller stones.
- His father struck it rich in the diamond business.
- He gave her a hugely expensive diamond ring.
- It was a beautiful necklace with a diamond pendant.
- A large diamond glinted on her finger.
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Geology: precious & semi-precious stones
- amethyst
- carbuncle
- crystal
- cultured pearl
- emerald
- garnet
- gem
- jade
- jet
- jewel
- malachite
- marcasite
- onyx
- opal
- pearl
- rock
- sapphire
- semiprecious
- stone
- topaz
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diamond noun (SHAPE)
B2 [ C or U ] a shape with four straight sides of equal length, forming two opposite angles that are wide and two that are narrow:
[ C ] the square part of a field on which baseball is played, surrounded by the four bases, or the whole field on which the game is played
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Geometrical shapes
- -cornered
- -dimensional
- circular
- cuboid
- cylinder
- cylindrical
- dome
- hexagon
- incongruent
- isometric
- lozenge
- octagon
- oval
- ovoid
- parallelogram
- polygon
- quadrilateral
- rhombus
- spherical
- triangle
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diamond noun (CARDS)
one of the four suits in playing cards, represented by a red diamond shape:
[ C ] a playing card from the suit of diamonds:
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Card games
- bridge
- canasta
- card sharp
- deal
- dealer
- discard
- flush
- grand slam
- jack
- joker
- pass
- pool
- royal flush
- rummy
- shuffle
- singleton
- solitaire
- stick
- strip poker
- suit
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