Online Google Dictionary

cleavage 中文解釋 wordnet sense Collocation Usage Collins Definition
Noun
/ˈklēvij/,
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cleavages, plural;
  1. A sharp division; a split
    • - a system dominated by the class cleavage
  2. The hollow between a woman's breasts when supported, esp. as exposed by a low-cut garment

  3. Cell division, esp. of a fertilized egg cell

  4. The splitting of rocks or crystals in a preferred plane or direction

  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
  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
  6. Cleavage is the between a woman's breasts lying over the sternum revealed by a garment with a low neckline. It is associated with low-cut women's clothing, such as evening gowns, swimwear, casual tops and other garments, designed to emphasize the display of breasts.
  7. Buttock cleavage is minor exposure of the buttocks and the gluteal cleft between them, often because of low-slung trousers. The crena is another formal term for the cleft between the buttocks.
  8. Cleavage, in mineralogy, is the tendency of crystalline materials to split along definite crystallographic structural planes. ...
  9. In embryology, cleavage is the division of cells in the early embryo. The zygotes of many species undergo rapid cell cycles with no significant growth, producing a cluster of cells the same size as the original zygote. ...
  10. A cleave in an optical fiber is a deliberate, controlled break, intended to create a perfectly flat endface, perpendicular to the longitudinal axis of the fiber. ...
  11. Cleavage, in structural geology and petrology, describes the tendency of a rock to break along preferred planes of weakness, caused by the development of a planar fabric as a result of deformation.
  12. The act of cleaving or the state of being cleft. [from 19th c.]; The tendency of a crystal to split along specific planes. [from 19th c.]; The repeated division of a cell into daughter cells after mitosis. [from 19th c. ...
  13. (cleaved) Having to do with the appearance of cells when viewed under a microscope. The nucleus of cleaved cells appears divided or segmented.
  14. A natural area of the diamond where a weak bond holds the atoms together. The gem will be split along these planes by the cutter.
  15. The plane of weakness of some gems where they will split apart with smooth surfaces. Gems with perfect cleavage are likely to break when being cut or faceted.
  16. Cell division in early embryos necessary for development
  17. The series of cell divisions, or one of the cell divisions, of the fertilized egg that results in the formation of the blastomeres and changes the single-celled zygote into a multicellular embryo.
  18. The ability of a rock mass to break along natural surfaces; a surface of natural parting.
  19. (a) The tendency of a crystalline mineral to break in certain definite directions, leaving a more or less smooth surface. (b) The act or process of producing such a break. (c) One of the portions of such a mineral resulting from such a break. ...
  20. Cleavage is the propensity of crystalline minerals, such as diamond, to split in one or more directions either along or parallel to certain planes, when struck by a blow. ...
  21. refers to the tendency of a diamond to split along the grain parallel to one of its octahedral faces. It is also a term applied to rough diamonds that have at some time been cleaved from a larger stone.
  22. Fracture of a crystal by crack propagation across a crystallographic plane of low index.
  23. A mineral is said to have cleavage if part of the crystal breaks when forcibly hit and the broken piece retains the crystal shape. A mineral that never produces any crystallised fragments when broken off by hitting has no cleavage.
  24. the line of weakness in a rock along which it will break when put under stress.
  25. describes the way a mineral may split apart along various planes. In thin section, cleavage is visible as thin, parallel lines across a mineral.