详细解释:n. 雉堞上的凹处, 枪眼
vt. 使...成雉堞状
英语解释：
名词 crenel:
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.)同义词：scallop, crenation, crenature, crenelle