- The definition of cleavage is the act of breaking or dividing something into two, or the space between a woman's breasts when they are pushed together.
- An example of cleavage is the separation of oil from olives.
- An example of cleavage is the area between the breasts of the models in the Victoria's Secret catalog.
cleavage definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
- 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
- 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
cleavage definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
- The act of splitting or cleaving.
- The state of being split or cleft; a fissure or division.
- Mineralogy The splitting or tendency to split of a crystallized substance along definite crystalline planes, yielding smooth surfaces.
- Embryology a. 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.b. Any single cell division in such a series.
- Chemistry The splitting of a complex molecule, such as a polysaccharide, into simpler molecules.
- Informal The hollow between a woman's breasts, especially as revealed by a low neckline.
cleavage - Cultural Definition
The New Dictionary of Cultural Literacy Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
cleavage - Medical Definition
The American Heritage® Medical Dictionary Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
- A series of cell divisions in the ovum immediately following fertilization. Also called segmentation.
- The splitting of a complex molecule into two or more simpler molecules. Also called scission.
- The linear clefts in the skin, indicating the general direction of the fibers in the dermis.
cleavage - Science Definition
- Geology The breaking of certain minerals along specific planes, making smooth surfaces. These surfaces are parallel to the faces of the molecular crystals that make up the minerals. A mineral that exhibits cleavage breaks into smooth pieces with the same pattern of parallel surfaces regardless of how many times it is broken. Some minerals, like quartz, do not have a cleavage and break into uneven pieces with rough surfaces.
- Biology a. The series of mitotic cell divisions by which a single fertilized egg cell becomes a many-celled blastula. Each division produces cells half the size of the parent cell.b. Any of the single cell divisions in such a series.