1. 堡眼：crenellation锯齿状物 锯齿状物 | crenelle堡眼 | crenitic泉华化
2. 枪眼/炮门：crenellation /枪眼设备/ | crenelle /枪眼/炮门/ | crenitic /泉华化/
3. 城或墙顶之垛口,枪眼,炮门：crenellation || 开垛口 | crenelle || 城或墙顶之垛口,枪眼,炮门 | crenophilus || 适泉的, 喜泉的
noun
1. a notch or open space between two merlons in a crenelated battlement
Synonym: crenel
2. 911查询·英语单词
2. 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.)