Definition of onyx
: a translucent chalcedony in parallel layers of different colors
Recent Examples of onyx from the Web
The input device, called Run, is an onyx shaft with a bulb on one end and sensors spaced along its surface.
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ONYX Defined for English Language Learners
Definition of onyx for English Language Learners
: a kind of stone that has straight lines of usually white and black or white and brown and that is used especially in jewelry
Seen and Heard
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