Meaning of DISPERSION in English


də̇ˈspər]zhən, -pə̄], -pəi], ]shən noun

( -s )

Etymology: Middle English dispersioun, from Middle French dispersion, from Latin dispersion-, dispersio, from dispersus + -ion-, -io -ion

1. usually capitalized : diaspora 1a

2. : the act or process of dispersing or the state of being dispersed:

a. : the scattering of the values of a frequency distribution from their average

b. : the spreading of troops, weapons, vehicles, or airplanes over a wide area to avoid offering the enemy a concentrated target

c. : the spreading of chemical agents in warfare by means of a bursting charge in a container

d. : the scattering of projectiles or bombs fired or released under apparently identical conditions


a. : the selective separation of a nonhomogeneous emission in accordance with some characteristic (as wavelength, particle mass, speed, or energy) ; especially : the separation of light into colors by refraction or diffraction with formation of a spectrum

b. : a measure of the degree of dispersion for any region of the spectrum commonly being the derivative of the separation with respect to the chosen characteristic (as wavelength) — compare dispersive power


a. : a dispersed substance : dispersed phase

b. : a system (as an emulsion or suspension) consisting of a dispersed substance and the medium in which it is dispersed : colloid lb : disperse system

Webster's New International English Dictionary.      Новый международный словарь английского языка Webster.