onyx

[ on-iks, oh-niks ]
/ ˈɒn ɪks, ˈoʊ nɪks /

noun

Mineralogy. a variety of chalcedony having straight parallel bands of alternating colors.Compare Mexican onyx.
(not used technically) an unbanded chalcedony dyed for ornamental purposes.
black, especially a pure or jet black.
Medicine/Medical. a nail of a finger or toe.

adjective

black, especially jet black.

Nearby words

  1. onychoschizia,
  2. onychosis,
  3. onychotillomania,
  4. onychotomy,
  5. onymous,
  6. onyx marble,
  7. onyxis,
  8. onz,
  9. oo,
  10. oo gauge

Origin of onyx

1250–1300; Middle English onix < Latin onyx < Greek ónyx nail, claw, veined gem

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for onyx


British Dictionary definitions for onyx

onyx

/ (ˈɒnɪks) /

noun

a variety of chalcedony with alternating black and white parallel bands, used as a gemstone. Formula: SiO 2
a compact variety of calcite used as an ornamental stone; onyx marble. Formula: CaCO 3

Word Origin for onyx

C13: from Latin from Greek: fingernail (so called from its veined appearance)

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for onyx

onyx

n.

mid-13c., from Old French oniche "onyx" (12c.), and directly from Latin onyx (genitive onychis), from Greek onyx "onyx-stone," originally "claw, fingernail" (see nail (n.)). So called because the mineral's color sometimes resembles that of a fingernail, pink with white streaks.

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for onyx

onyx

[ ŏnĭks ]

n.

unguis
A collection of pus in the anterior chamber of the eye.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for onyx

onyx

[ ŏnĭks ]

A type of chalcedony that occurs in straight and parallel bands of different colors, often black and white.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.