Cleavage - Definition

n 1: the state of being split or cleft; "there was a cleavage
between the liberal and conservative members"
2: the breaking of a chemical bond in a molecule resulting in
smaller molecules
3: (embryology) the repeated division of a fertilised ovum [syn:
cleavage, segmentation]
4: the line formed by a groove between two parts (especially the
separation between a woman's breasts)
5: the act of cleaving or splitting