1. 銃眼付き胸壁の2つのマーロンの間にある切り欠き、または空間(a notch or open space between two merlons in a crenelated battlement)
2. 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)(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.))