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

opal

noun
 
/ˈəʊpl/
 
/ˈəʊpl/
[countable, uncountable]
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  1. a white or almost clear semi-precious stone in which changes of colour are seen, used in jewellery
    • an opal ring
    Topics Clothes and Fashionc2
    Word Originlate 16th cent.: from French opale or Latin opalus, probably based on Sanskrit upala ‘precious stone’ (the stone was first brought from India).
See opal in the Oxford Advanced American Dictionary
previously
adverb
 
 
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