coving
US /ˈkoʊ.vɪŋ/
UK /ˈkoʊ.vɪŋ/

1.
a concave molding or curved junction at the meeting of a wall and a ceiling
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The room was finished with decorative coving around the ceiling.
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Installing coving can add an elegant touch to any room.
1.
the act of forming a concave molding or curved junction
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The plasterer was skilled in the art of coving.
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Careful coving ensures a smooth transition between wall and ceiling.
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