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

concavity

noun
 
/kɒnˈkævəti/
 
/kɑːnˈkævəti/
(plural concavities)
(specialist)
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  1. [uncountable] the quality of being concave (= curving in)
    • Rocks exposed to wind often show some degree of concavity.
  2. [countable] a shape or place that curves in
    • a deep concavity in the side of the hill
    Topics Colours and Shapesc2
See concavity in the Oxford Advanced American Dictionary
dressing
noun
 
 
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