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

protuberance

noun

/prəˈtjuːbərəns/

/prəʊˈtuːbərəns/

(formal)

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a round part that sticks out from a surface synonym bulge
- The diseased trees are marked by protuberances on their trunks.
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See protuberance in the Oxford Advanced American Dictionary

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adjective

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