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Definition of onyx noun from the Oxford Advanced Learner's Dictionary

onyx

noun
 
/ˈɒnɪks/
 
/ˈɑːnɪks/
[uncountable]
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  1. a type of stone that has layers of different colours in it, usually used to make or decorate objects
    Word OriginMiddle English: from Old French oniche, onix, via Latin from Greek onux ‘fingernail or onyx’.
See onyx in the Oxford Advanced American Dictionary
Check pronunciation: onyx

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trait
noun
 
 
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