cleavages definition
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- Full Definition of CLEAVAGE. 1. a: the quality of a crystallized substance or rock of splitting along definite planes; also: the occurrence of such splitting b: a fragment (as of a diamond) obtained by splitting. 2. : the action of cleaving: the state of being cleft. 3.
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- : cell division by simple cleavage of the nucleus and division of the cytoplasm without spindle formation or appearance of chromosomes—called also direct cell division.
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What s the difference between a mineral that has cleavage and one that has fracture? Cleavage is the breaking of a mineral along flat surfaces. Fracture, on the hand is just the chipping or fracture of a mineral. Cleavage is the tendency to break along flat …surfaces, and fracture is the tendency of a mineral to break into irregular pieces.
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MINERAL PROPERTIES: CLEAVAGE  (Including Fracture and Parting) Fracture is the characteristic mark left when a mineral chips or breaks. Cleavage and fracture differ in that cleavage is the break of a crystal face where a new face (resulting in a smooth plane) is formed, whereas fracture is the chipping shape of a mineral. All minerals exhibit a fracture, even those that exhibit cleavage.
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What is Gemstone Cleavage? “Green Fluorite with Prominent Cleavage” by Armenta Isai is licensed under CC By-SA 2.0 BR. Just as wood is easier to split with the grain than against it, gemstone cleavage is the tendency of certain crystals to break along definite plane surfaces. If there are planes in a crystal structure with relatively weak atomic bonds, the crystal is more likely to break along those planes.
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- Full Definition of CLEAVAGE. 1. a: the quality of a crystallized substance or rock of splitting along definite planes; also: the occurrence of such splitting b: a fragment (as of a diamond) obtained by splitting. 2.
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- Fission Definition: Fission is the splitting of an atomic nucleus into two or more lighter nuclei accompanied by energy release. The original heavy atom is termed the parent nucleus and the lighter nuclei are daughter nuclei. By Anne Marie Helmenstine, Ph.D.
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cameo See more synonyms on Thesaurus.com. noun, plural cameos. 1. a technique of engraving upon a gem or other stone, as onyx, in such a way that an underlying stone of one color is exposed as a background for a low-relief design of another color.
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Dosing & Uses Geriatric Dosing. Preoperative sedation/anxiolysis with anterograde amnesia. 1  IM: 1-3 mg (~35-40 mcg/kg) 30-60 minutes before surgery; some elderly patients may respond to as little as 1 mg; onset is 15 minutes (peaking at 30-60 min). 2  IV maintenance: 10-15% of initial effective dose PRN by slow titration.
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- (plural clefts) 1  An opening, fissure, or V-shaped indentation made by or as if by splitting. 2  A piece made by splitting. a cleft of wood. 3  A disease of horses; a crack on the band of the pastern.
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Definitions &Translations In cell biology, the cleavage furrow is the indentation of the cell's surface that begins the progression of cleavage, by which animal and some algal cells undergo cytokinesis, the final splitting of the membrane, in the process of cell division.
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Cleavage / fracture Definitions. Cleavage-The tendency of a mineral to break along flat planar surfaces as determined by the structure of its crystal lattice. These two-dimensional surfaces are known as cleavage planes and are caused by the alignment of weaker bonds between atoms in the crystal lattice.efinitions. Cleavage-The tendency of a mineral to break along flat planar surfaces as determined by the structure of its crystal lattice. These two-dimensional surfaces are known as cleavage planes and are caused by the alignment of weaker bonds between atoms in the crystal lattice.
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cleavage site 1. division into distinct parts, e.g. the double helix. 2. the early successive splitting of a fertilized ovum into smaller cells (blastomeres) by mitosis. See also holoblastic, meroblastic. cleavage site. the places on a strand of DNA where the restriction enzyme cleaves the DNA.
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- Obviously, if many more than two parallel cleavage surfaces exist it is still considered a single cleavage direction. hornblende. 1) In the specimen above the two cleavage directions are at 60 o and 120 o to one another. You can see the 120 o angle between cleavage planes along the top of the photograph.
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cleft Definition of cleft. 1 : a space or opening made by or as if by splitting : fissure. 2 : a usually V-shaped indented formation : a hollow between ridges or protuberances the anal cleft of the human body.
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Cleavage (embryo) The processes of karyokinesis (mitosis) and cytokinesis work together to result in cleavage. The mitotic apparatus is made up of a central spindle and polar asters made up of polymers of tubulin protein called microtubules.
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- Definition of coup. plural. coups. play \ˈküz\. 1 : a brilliant, sudden, and usually highly successful stroke or act She pulled off quite a coup when she snagged the usually reclusive author for an interview. 2 : coup d'état.
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Cleavage / fracture Cleavage-The tendency of a mineral to break along flat planar surfaces as determined by the structure of its crystal lattice. These two-dimensional surfaces are known as cleavage planes and are caused by the alignment of weaker bonds between atoms in the crystal lattice.
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What is cleavage? Best Answer: here are some...meaning: Cleavage in general refers to a division or separation of form. Its usage is heavily dependent on cultural context, where it may refer to: Cleavage (crystal), in mineralogy and materials science, is a process of splitting a single crystal. Cleavage (geology), Foliation perpendicular to stress as a result of ductile deformation. e.g. shales (shists) Cleavage (embryo), in embryology, is the division of cells in the early embryo. Cleavage (fiber), in optical fibers.
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- Cleavage and Fracture. Click here to go back to the main page. Cleavage is the tendency of a mineral to break along smooth planes parallel to zones of weak bonding. Fracture is the tendency of a mineral to break along curved surfaces without a definite shape. These minerals do not have planes of weakness and break irregularly. See the picture below:
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- Cleavage. Cleavage is a series of rapid cell divisions without cell growth or gene expression which occurs in early embryogenesis. Early cleavage divisions in most embryos are reductive. During cleavage, the cytoplasm is divided into smaller and smaller cells, called blastomeres.The total cellular volume of the embryo stays the same, but the number of cells within the embryo increases. Cleaving cells have a modified cell cycle, in which the two gap phases, G1 and G2, are completely omitted.leavage. Cleavage is a series of rapid cell divisions without cell growth or gene expression which occurs in early embryogenesis. Early cleavage divisions in most embryos are reductive. During cleavage, the cytoplasm is divided into smaller and smaller cells, called blastomeres.
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Mitosis Cytokinesis is the physical process that finally splits the parent cell into two identical daughter cells. During cytokinesis, the cell membrane pinches in at the cell equator, forming a cleft called the cleavage furrow.ytokinesis is the physical process that finally splits the parent cell into two identical daughter cells. During cytokinesis, the cell membrane pinches in at the cell equator, forming a cleft called the cleavage furrow.
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Cleavage / fracture Cleavage and fracture describe different ways in which a mineral can break. Cleavage-The tendency of a mineral to break along flat planar surfaces as determined by the structure of its crystal lattice.
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- See also. 1  Cleavage (geology) 2  Discontinuity (Geotechnical engineering) 3  Fissility (geology) 4  Fold (geology) 5  List of rock textures. 6  List of rock types. 7  Rock microstructure. 8  Shear (geology)
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- Full Definition of FISSION. 1. : a splitting or breaking up into parts. 2. : reproduction by spontaneous division of the body into two or more parts each of which grows into a complete organism. 3. : the splitting of an atomic nucleus resulting in the release of large amounts of energy.
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GeoMan's Mineral ID Tests Cleavage is controlled by the internal crystalline order of the mineral. A mineral can have 1, 2, 3, 4, or 6 planes of cleavage. If more than one (1) plane is present, it is important to note the angles between the cleavages. Cleavage can be obscured, but is diagnostic when present.