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Cleavage   /klˈivədʒ/  /klˈivɪdʒ/   Listen
noun
Cleavage  n.  
1.
The act of cleaving or splitting.
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.
3.
(Geol.) Division into laminae, like slate, with the lamination not necessarily parallel to the plane of deposition; usually produced by pressure.
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 cleavage. (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.






Collaborative International Dictionary of English 0.48








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"Cleavage" Quotes from Famous Books



... shales, sandstones, and limestones, may be found resting with a very slight inclination on still older sediments. In a great many regions, however, the Silurian deposits are found to have undergone more or less folding, crumpling, and dislocation, accompanied by induration and "cleavage" of the finer and softer sediments; whilst in some regions, as in the Highlands of Scotland, actual "metamorphism" has taken place. In consequence of the above, Silurian districts usually present the bold, rugged, and picturesque outlines which are characteristic of the older "Primitive" ...
— The Ancient Life History of the Earth • Henry Alleyne Nicholson

... soon proved, Mrs. Ridge's croaking was not without justification. The crash in Milly's affairs came, not until the autumn, a few weeks before the day set for the wedding, and it came on the line of cleavage already described, although quite unexpectedly and over a trivial matter, as such ...
— One Woman's Life • Robert Herrick

... Philip, leaning back in his chair and letting the folio rest on his knees, "you see there are religious totems that run through all denominations of Christians and even through different religions, and the lines of cleavage between them are deeper than those between Moslems and Christians, or between Jews and idolaters. There is what I call the totem of the Wahahbees—the people who translate religion into dispute or persecution. In central Asia they get rid of an opponent by assassination in ...
— The Faith Doctor - A Story of New York • Edward Eggleston

... experience, into the imaginary regions of the future. What do we find has been, and is, the tendency of the peoples of this continent? Does not history show, and do not modern and existing tendencies declare, that the lines of cleavage among them lie along the lines of latitude? Men spread from east to west, and from east to west the political lines, which mean the lines of diversity, extend. The central spaces are, and will be yet ...
— Memories of Canada and Scotland - Speeches and Verses • John Douglas Sutherland Campbell

... one of the few, and certainly one of the most fundamental chasms of cleavage between the two sexes; a chasm bridged by habit invariably, because some sort of thoroughfare has to exist, bridged, too, more rarely, by intellectual understanding. But never bridged, I think, between two persons strongly masculine ...
— The Real Adventure • Henry Kitchell Webster


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