Definition of onyx

Email this page to a friend

< -onymy

oo- >

on·yx    (nks) KEY 

NOUN:

A chalcedony that occurs in bands of different colors and is used as a gemstone, especially in cameos and intaglios.

---

ETYMOLOGY:
Middle English onix, from Old French, from Latin onyx, from Greek onux, nail, onyx; see nogh- in Indo-European roots