rondure

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ron·dure

R0297200 (rŏn′jər, -dyo͝or′)n. A circular or gracefully rounded object.
[French rondeur, roundness, from Old French, from ronde, round; see round1.]

rondure

(ˈrɒndjʊə) n1. a circle or curve2. roundness or curvature[C17: from French rondeur, from rond round]