one of a series of rounded projections (or the notches between them) formed by curves along an edge (as the edge of a leaf or piece of cloth or the margin of a shell or a shriveled red blood cell observed in a hypertonic solution etc.) 淵に沿った曲線により形成される円形突起（または、それらの間のV字形の切込み）の1つ（葉の縁、布切れ、貝殻の縁、高張液中のしわがよった赤血球など）。
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