cleavage

n. 劈开, 裂片, 分裂
【化】 解理
【医】 裂, 分裂; 卵裂

cleav.age

n.（名词）
The act of splitting or cleaving.
劈开：劈开或撕裂的动作
The state of being split or cleft; a fissure or division.
分裂，裂缝：劈开或裂开的状态；裂缝或分裂
Mineralogy The splitting or tendency to split of a crystallized substance along definite crystalline planes, yielding smooth surfaces.
【矿物学】 解理，裂纹：结晶物质沿一定结晶面产生光滑面的分裂或分裂倾向
Embryology
【胚胎学】
The series of mitotic cell divisions that produces a blastula from a fertilized ovum. It is the basis of the multicellularity of complex organisms.Also called segmentation
卵裂，卵割：由一组有丝分裂细胞从受精卵中生成的囊胚，是复杂有机体中多细胞的主要成分也作 segmentation
Any single cell division in such a series.
细胞分裂：这种一组分裂中的任何一次简单细胞分裂
Informal The hollow between a woman`s breasts, especially as revealed by a low neckline.
【非正式用语】 乳沟，胸槽：妇女两乳间的凹陷，尤指低领口展露的部分