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Definitions for Onyx

[1] Mineralogy . a variety of chalcedony having straight parallel bands of alternating colors. Compare Mexican onyx.
[2] (not used technically) an unbanded chalcedony dyed for ornamental purposes.
[3] black, especially a pure or jet black.
[4] Medicine/Medical . a nail of a finger or toe.
[5] black, especially jet black.
[6] a variety of chalcedony with alternating black and white parallel bands, used as a gemstone. Formula: SiO 2
[7] a compact variety of calcite used as an ornamental stone; onyx marble. Formula: CaCO 3

Words related to Onyx

jet, coal, slate, pitch, jetty, sable, brunet, ebony, charcoal, sloe, obsidian, raven, clouded, dingy, dusky, inky, livid, murky, pitch-black, pitchy

Words nearby Onyx

onychoschizia, onychosis, onychotillomania, onychotomy, onymous, onyx, onyx marble, onyxis, onz, oo gauge, oo-

Origin of Onyx

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

Word origin for Onyx

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

Synonyms for Onyx

brunet, charcoal, coal, ebony, jet, jetty, obsidian, pitch, raven, sable, slate, sloe, atramentous, clouded, dingy, dusky, ebon, inklike, inky, livid, melanoid, murky, piceous, pitch-black, pitch-dark, pitchy, shadowy, somber, sombre, sooty, starless, stygian, swart, swarthy