coving
plural of angustation
(informal) A difficult problem or puzzle.
A concave surface forming a junction between a ceiling and a wall. / The vertical sides connecting the jambs with the breast of a fireplace.
(genetics) replication of DNA between noncognate viruses
塗装業者は部屋を塗り直す前に、天井と壁の接合部にある凹状のモールディングを修理した。
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