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Webster's New World College Dictionary » cleavage
cleavage
cleavage definition
cleav·age (klēv′ij)
noun
- a cleaving, splitting, or dividing
- the manner in which a thing splits
- a cleft; fissure; division
- the hollow between a woman's breasts, as made visible by a low-cut neckline
- Biol.
- cell division, esp. the series of mitotic cell divisions that transform the fertilized ovum into the earliest embryonic stage
- any single division in this series
- Mineralogy the tendency of some minerals to break in definite planes, producing smooth surfaces
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