sar·don·yx

[sahr-don-iks, sahr-dn-]
noun
a chalcedony that is used for cameos and has sard and chalcedony of another color, usually white, arranged in straight parallel bands.
Origin:
1300–50; Middle English < Latin < Greek sardónyx; see sard, onyx

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Collins
World English Dictionary
sardonyx (ˈsɑːdənɪks) [Click for IPA pronunciation guide]
 
—n
a variety of chalcedony with alternating reddish-brown and white parallel bands, used as a gemstone. Formula: SiO2
 
[C14: via Latin from Greek sardonux, perhaps from sardionsardine² + onux nail]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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00:10
Sardonyx is always a great word to know.
So is zedonk. Does it mean:
the offspring of a zebra and a donkey.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
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Easton
Bible Dictionary

Sardonyx definition


(Rev. 21:20), a species of the carnelian combining the sard and the onyx, having three layers of opaque spots or stripes on a transparent red basis. Like the sardine, it is a variety of the chalcedony.

Easton's 1897 Bible Dictionary
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Example sentences
Sardonyx is a form of onyx with layers of reddish-brown and white banding.
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