Cleavage

Cleavage
Cleavage Cleav"age, n. 1. The act of cleaving or splitting. [1913 Webster]

2. (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}. [1913 Webster]

3. (Geol.) Division into lamin[ae], like slate, with the lamination not necessarily parallel to the plane of deposition; -- usually produced by pressure. [1913 Webster]

{Basal cleavage}, cleavage parallel to the base of a crystal, or to the plane of the lateral axes.

{Cell cleavage} (Biol.), multiplication of cells by fission. See {Segmentation}.

{Cubic cleavage}, cleavage parallel to the faces of a cube.

{Diagonal cleavage}, cleavage parallel to ta diagonal plane.

{Egg clavage}. (Biol.) See {Segmentation}.

{Lateral cleavage}, cleavage parallel to the lateral planes.

{Octahedral cleavage}, {Dodecahedral cleavage}, or {Rhombohedral cleavage}, cleavage parallel to the faces of an octahedron, dodecahedron, or rhombohedron.

{Prismatic cleavage}, cleavage parallel to a vertical prism. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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  • Cleavage — Cleavage. См. Расщепление. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) …   Словарь металлургических терминов

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  • cleavage — 1816, in geology, action of splitting (rocks or gems) along natural fissures, from CLEAVE (Cf. cleave) (1) + AGE (Cf. age). General meaning action or state of cleaving or being cleft is from 1867. The sense of cleft between a woman s breasts in… …   Etymology dictionary

  • cleavage — [n] gap break, chasm, cleft, discontinuity, divide, division, fracture, hole, rift, schism, separation, severance, split, valley; concept 513 …   New thesaurus

  • cleavage — ► NOUN 1) a sharp division; a split. 2) the cleft between a woman s breasts. 3) Biology cell division, especially of a fertilized egg cell. 4) the splitting of rocks or crystals in a preferred plane or direction …   English terms dictionary

  • cleavage — [klēv′ij] n. 1. a cleaving, splitting, or dividing 2. the manner in which a thing splits 3. a cleft; fissure; division 4. the hollow between a woman s breasts, as made visible by a low cut neckline 5. Biol. a) cell division, esp. the series of… …   English World dictionary

  • cleavage — /klee vij/, n. 1. the act of cleaving or splitting. 2. the state of being cleft. 3. the area between a woman s breasts, esp. when revealed by a low cut neckline. 4. a critical division in opinion, beliefs, interests, etc., as leading to… …   Universalium

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