from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A chalcedony that occurs in bands of different colors and is used as a gemstone, especially in cameos and intaglios.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A banded variety of chalcedony, a cryptocrystalline form of quartz.
- adj. jet-black
from the GNU version of the Collaborative International Dictionary of English
- n. Chalcedony in parallel layers of different shades of color. It is used for making cameos, the figure being cut in one layer with the next as a ground.
- n. Same as Mexican onyx.
- n. A deep jet-black color.
- adj. Deep, jet-black.
from The Century Dictionary and Cyclopedia
- n. A variety of quartz, closely allied to agate, characterized by a structure in parallel bands differing in color or in degree of translucency: in the better kinds the layers are sharply defined and the colors white with black, brown, or red.
- n. An infiltration of pus between he layers of the cornea, resembling a nail.
- n. In conchology: The piddock, Pholas dactylus.
- n. A razor-shell; a bivalve of the family Solenidæ.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a chalcedony with alternating black and white bands; used in making cameos
Middle English onix, from Old French, from Latin onyx, from Greek onux, nail, onyx; see nogh- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
Before 1300 as onix, in about 1250 as oneche, from Old French oniche or onix, or from Latin onyx, from Greek ὄνυξ (onyx). (Wiktionary)