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Definition of: concave
(kon·kāv′, kon′kāv, kong′-) adjective
1. Hollow and rounded, as the interior of a sphere or circle; incurved: opposed to convex.
2. Hollow.
—noun (kon′kāv, kong′-) A concave surface; vault. [<MF <L concavus <com- thoroughly + cavus hollow]
—con·cave′ly adverb
—con·cave′ness noun
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