from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun The act of splitting or cleaving.
  • noun The state of being split or cleft; a fissure or division.
  • noun Mineralogy The splitting or tendency to split of a crystallized substance along definite crystalline planes, yielding smooth surfaces.
  • noun The series of mitotic cell divisions that produces a blastula from a fertilized ovum. It is the basis of the multicellularity of complex organisms.
  • noun Any single cell division in such a series.
  • noun Chemistry The splitting of a complex molecule, such as a polysaccharide, into simpler molecules.
  • noun Informal The hollow between a woman's breasts, especially as revealed by a low neckline.

from The Century Dictionary.

  • noun The act of cleaving or splitting, or the state of being cloven.
  • noun In mineralogy, the property possessed by many crystallized minerals of breaking readily in one or more directions, by which means surfaces more or less smooth are obtained.
  • noun In geology, the property possessed by certain rocks of being easily split or divided into thin layers.
  • noun In embryology, segmentation, specifically of the vitellus: distinctively called egg-cleavage or yolk-cleavage. See segmentation.

from the GNU version of the Collaborative International Dictionary of English.

  • noun The act of cleaving or splitting.
  • noun (Crystallog.) The quality possessed by many crystallized substances of splitting readily in one or more definite directions, in which the cohesive attraction is a minimum, affording more or less smooth surfaces; the direction of the dividing plane; a fragment obtained by cleaving, as of a diamond. See Parting.
  • noun (Geol.) Division into laminæ, like slate, with the lamination not necessarily parallel to the plane of deposition; -- usually produced by pressure.
  • noun cleavage parallel to the base of a crystal, or to the plane of the lateral axes.
  • noun (Biol.) multiplication of cells by fission. See Segmentation.
  • noun cleavage parallel to the faces of a cube.
  • noun cleavage parallel to ta diagonal plane.
  • noun (Biol.) See Segmentation.
  • noun cleavage parallel to the lateral planes.
  • noun cleavage parallel to the faces of an octahedron, dodecahedron, or rhombohedron.
  • noun cleavage parallel to a vertical prism.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun chemistry The splitting of a large molecule into smaller ones.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun the line formed by a groove between two parts (especially the separation between a woman's breasts)
  • noun the breaking of a chemical bond in a molecule resulting in smaller molecules
  • noun the act of cleaving or splitting
  • noun (embryology) the repeated division of a fertilised ovum
  • noun the state of being split or cleft


from Wiktionary, Creative Commons Attribution/Share-Alike License

From cleave +‎ -age.


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  • The only word that is its own antonym.

    January 29, 2007