diffusivity

[ dif-yoo-siv-i-tee ]
/ ˌdɪf yʊˈsɪv ɪ ti /

noun Physics.

the property of a substance indicative of the rate at which a thermal disturbance, as a rise in temperature, will be transmitted through the substance.

QUIZZES

THIS WEEK’S WORD OF THE DAY QUIZ IS POSITIVELY FELICIFIC

Do you study our Words of the Day with great assiduity? See how many you remember from March 30 to April 5!
Question 1 of 7
transliterate

Origin of diffusivity

First recorded in 1875–80; diffusive + -ity
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for diffusivity

  • Taking a foot as the unit of length, and a year as the unit of time, we find the diffusivity of the surface strata to be 400.

    Lord Kelvin|Andrew Gray

British Dictionary definitions for diffusivity

diffusivity
/ (ˌdɪfjuːˈsɪvɪtɪ) /

noun

a measure of the ability of a substance to transmit a difference in temperature; expressed as the thermal conductivity divided by the product of specific heat capacity and density
physics
  1. the ability of a substance to permit or undergo diffusion
  2. another name for diffusion coefficient
another name for diffusion (def. 5)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012