cleavage ,
n :
The act of cleaving or the state of being cleft. [from 19th c.] The hollow or separation between a woman's breasts, especially as revealed by a low neckline. [from 20th c.] (by extension) Any similar separation between two body parts, such as the buttocks or toes. (biology) The repeated division of a cell into daughter cells after mitosis. [from 19th c.] (chemistry) The splitting of a large molecule into smaller ones. (mineralogy) The tendency of a crystal to split along specific planes. [from 19th c.] (politics) The division of voters into voting blocs.
