cohesion

cohesion
—cohesionless, adj.
/koh hee"zheuhn/, n.
1. the act or state of cohering, uniting, or sticking together.
2. Physics. the molecular force between particles within a body or substance that acts to unite them. Cf. adhesion (def. 4).
3. Bot. the congenital union of one part with another.
4. Ling. the property of unity in a written text or a segment of spoken discourse that stems from links among its surface elements, as when words in one sentence are repeated in another, and esp. from the fact that some words or phrases depend for their interpretation upon material in preceding or following text, as in the sequence Be assured of this. Most people do not want to fight. However, they will do so when provoked, where this refers to the two sentences that follow, they refers back to most people, do so substitutes for the preceding verb fight, and however relates the clause that follows to the preceding sentence. Cf. coherence (def. 5).
[1670-80; var. of cohaesion < L cohaes- (var. s. of cohaerere to COHERE) + -ion- -ION]

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      in physics, the intermolecular attractive force acting between two adjacent portions of a substance, particularly of a solid or liquid. It is this force that holds a piece of matter together. Intermolecular forces act also between two dissimilar substances in contact, a phenomenon called adhesion. These forces originate principally because of coulomb (electrical) forces. When two molecules are close together, they are repelled; when farther apart, they are attracted; and when they are at an intermediate distance, their potential energy is at a minimum, requiring the expenditure of work to either approximate or separate them. Thus, work is required to pull apart two objects in intimate contact, whether they be of the same or different material.

      The attractive forces of cohesion and adhesion act over a short range and vary in magnitude, depending on the substances concerned. If a piece of glass is submerged in water and then withdrawn, it will be wet—i.e., water will cling to it, showing that the force of adhesion between water and glass molecules is greater than the force of cohesion between water molecules.

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Universalium. 2010.

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  • cohésion — [ kɔezjɔ̃ ] n. f. • 1740; lat. cohæsio « proximité », de cohærere « adhérer ensemble » 1 ♦ Phys. Ensemble des forces qui maintiennent associés les éléments d un même corps (⇒ adhérence, cohérence). La cohésion des gaz est faible ou nulle. Énergie …   Encyclopédie Universelle

  • Cohesion — may refer to: Cohesion (chemistry), the intermolecular attraction between like molecules Cohesion (computer science), a measure of how well the lines of source code within a module work together Cohesion (geology), the part of shear strength that …   Wikipedia

  • Cohesion — Cohésion Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom. Cohésion (Linguistique): effet de continuité et de progression sémantique et référentielle produit dans un texte par un dispositif linguistique.… …   Wikipédia en Français

  • cohesión — sustantivo femenino 1. Unión o relación estrecha entre personas o cosas: Es una familia con mucha cohesión. La cohesión de la nueva dirección está asegurada. Es dudosa la cohesión de sus decisiones. 2. Área: física Unión recíproca de las… …   Diccionario Salamanca de la Lengua Española

  • Cohesion — Co*he sion, n. [Cf. F. coh[ e]sion. See {Cohere}.] 1. The act or state of sticking together; close union. [1913 Webster] 2. (Physics) That from of attraction by which the particles of a body are united throughout the mass, whether like or unlike; …   The Collaborative International Dictionary of English

  • cohésion — COHÉSION. s. f. Terme de Physique. Adhérence, force par la quelle des corps sont unis entre eux. Les parties des liqueurs grasses ont une certaine cohésion qui en rend la séparation moins aisée …   Dictionnaire de l'Académie Française 1798

  • cohesión — ‘Unión’: «Aquel incidente daba cohesión al grupo, lo fortalecía» (SchzOstiz Infierno [Esp. 1995]). Este sustantivo y el verbo derivado cohesionar se pronuncian [koesión] y [koesionár], respectivamente. Son incorrectas las pronunciaciones ⊕… …   Diccionario panhispánico de dudas

  • cohesion — 1670s, from Fr. cohésion, from L. cohaesionem (nom. cohaesio) a sticking together, noun of action from pp. stem of cohaerere to stick together (see COHERE (Cf. cohere)) …   Etymology dictionary

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

  • cohesion — index accession (annexation), adherence (adhesion), adhesion (affixing), attachment (act of affixing), coaction, coalescence …   Law dictionary

  • cohesion — *cohere nee Analogous words: unification, consolidation, concentration, compacting (see corresponding verbs at COMPACT): coalescence, fusing or fusion, blending or blend, merging (see corresponding verbs at MIX) Contrasted words: disintegration,… …   New Dictionary of Synonyms

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