bn:00021522n
Noun Concept
EN
concave shape  concavity  incurvation  incurvature
EN
A shape that curves or bends inward WordNet 3.0
Definitions
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EN
A shape that curves or bends inward WordNet 3.0 & Open English WordNet
The state of being curved or bent; any curved shape or formation; curvature; a curve; a bend. Wiktionary
WordNet 3.0 & Open English WordNet
Wiktionary