dispersion

dispersion
1. The act of dispersing or of being dispersed. SYN: dispersal. 2. Incorporation of the particles of one substance into the mass of another, including solutions, suspensions, and colloidal dispersions (solutions). 3. Specifically, what is usually called a colloidal solution. 4. The extent or degree in which values of a statistical frequency distribution are scattered about a mean or median value. [L. dispersio]
- coarse d. SYN: suspension (4).
- colloidal d. SYN: colloidal solution.
- molecular d. d. in which the dispersed phase consists of individual molecules; if the molecules are of less than colloidal size, the result is a true solution.
- optic rotatory d. (ORD) the change in optic rotation with the wavelength of the incident monochromatic polarized light; the displacement of the former from zero within the absorption band is known as the Cotton effect.
- temporal d. asynchronous repolarization of myocardial fibers that predisposes to abnormal current flow and ectopic rhythms (especially with bradyarrhythmias or ventricular tachyarrhythmias).

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dis·per·sion dis-'pər-zhən, -shən n
1) the act or process of dispersing: the state of being dispersed
2) the separation of light into colors by refraction or diffraction with formation of a spectrum also the separation of radiation into components in accordance with some varying characteristic (as energy)
3 a) a dispersed substance
b) a system consisting of a dispersed substance and the medium in which it is dispersed: COLLOID (2b) called also disperse system

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dis·per·sion (dis-purґzhən) [L. dispersio] 1. the act of scattering or separating; the condition of being scattered. 2. the incorporation of the particles of one substance into the body of another, comprising solutions, suspensions, and colloid systems. a 3. colloid system, particularly an unstable one.

Medical dictionary. 2011.

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  • dispersion — [ dispɛrsjɔ̃ ] n. f. • XIIIe, rare av. XVIIe; lat. dispersio, de dispersus → disperser ♦ Action de disperser, de se disperser; état de ce qui est dispersé. ⇒ dissémination, division, éparpillement. La dispersion des cendres par le vent. La… …   Encyclopédie Universelle

  • Dispersion — may refer to: In physics: The dependence of wave velocity on frequency or wavelength: Dispersion (optics), for light waves Dispersion (water waves) Acoustic dispersion, for sound waves Dispersion relation, the mathematical description of… …   Wikipedia

  • Dispersion — (von lat. dispergere, „ausbreiten, zerstreuen“) bezeichnet: in der Physik die Abhängigkeit von Welleneigenschaften (insbesondere der Ausbreitungsgeschwindigkeit) von der Wellenlänge, siehe: Dispersion (Physik) Dispersion (Wasserwellen) an der… …   Deutsch Wikipedia

  • Dispersión — Saltar a navegación, búsqueda En matemáticas, dispersión significa el grado de distanciamiento de un conjunto de valores respecto a su valor medio. En física, dispersión es el fenómeno por el cual un conjunto de partículas que se mueve en una… …   Wikipedia Español

  • Dispersion — (lat., Zerstreuung, Farbenzerstreuung), Zerlegung des weißen oder überhaupt des zusammengesetzten Lichtes oder andrer Strahlungen in die verschiedenfarbigen oder verschiedenartigen unsichtbaren Bestandteile vermöge deren verschiedener… …   Meyers Großes Konversations-Lexikon

  • Dispersion — Dis*per sion, n. [CF. F. dispersion.] 1. The act or process of scattering or dispersing, or the state of being scattered or separated; as, the Jews in their dispersion retained their rites and ceremonies; a great dispersion of the human family… …   The Collaborative International Dictionary of English

  • dispersion — DISPERSION. s. f. Action de disperser, ou par laquelle on est dispersé. La dispersion est une des peines dont Dieu menaça et punit les Juifs. La dispersion des Juifs a été prédite par les Prophètes et par Notre Seigneur dans l Évangile …   Dictionnaire de l'Académie Française 1798

  • dispersión — sustantivo femenino 1. Acción y resultado de dispersar o dispersarse: La dispersión de los efectivos policiales obligó a los gamberros a no actuar. La dispersión de las empresas dificulta el control de los vertidos ilegales …   Diccionario Salamanca de la Lengua Española

  • dispersion — Dispersion. s. f. v. Action de disperser, ou par laquelle on est dispersé. La dispersion est une des peines dont Dieu menaça & punit les Juifs. la dispersion des Juifs a esté predite par les Prophetes & par N. S. dans l Evangile …   Dictionnaire de l'Académie française

  • Dispersion — des Lichts, s. Farben; Dispersion der Wärmestrahlen, s. Wärmestrahlung …   Lexikon der gesamten Technik

  • dispersion — late 14c., from O.Fr. dispersion (13c.), from L. dispersionem (nom. dispersio) a scattering, noun of action from pp. stem of dispergere (see DISPERSE (Cf. disperse)) …   Etymology dictionary

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