C2 noun #145,079 most common

onyx

UK /ˈɒnɪks/ | US /ˈɒnɪks/

A banded variety of chalcedony, a cryptocrystalline form of quartz.

onyx in 30 Seconds

  • (noun) A banded variety of chalcedony, a cryptocrystalline form of quartz.
  • (noun) A jet-black color, named after the gemstone.
  • (noun) Any of various lycaenid butterflies of the genus Horaga.

Meanings

  1. 1
    noun A banded variety of chalcedony, a cryptocrystalline form of quartz.
  2. 2
    noun A jet-black color, named after the gemstone.
  3. 3
    noun Any of various lycaenid butterflies of the genus Horaga.
  4. 4
    adjective Jet-black
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