sardonyx
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sar·don·yx
(sär-dŏn′ĭks, sär′dn-ĭks′)n.
An onyx with alternating brown and white bands of sard and other minerals.
[Middle English sardonix, probably from Latin sardonyx, from Greek sardonux : sardion, sard; see sard + onux, onyx, nail; see nogh- in Indo-European roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
sardonyx
(ˈsɑːdənɪks)n
(Minerals) 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 sardion sardine2 + onux nail]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
sar•don•yx
(sɑrˈdɒn ɪks, ˈsɑr dn-)n.
an onyx composed of layers of sard and chalcedony of another color, usu. white: used as a gem and to make cameos.
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Noun | 1. | ![]() onyx - a chalcedony with alternating black and white bands; used in making cameos |
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