Try Our Apps


The Best Internet Slang


[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.
Origin of diffusivity
First recorded in 1875-80; diffusive + -ity Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
Cite This Source
Examples from the Web for diffusivity
Historical Examples
  • 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


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
  1. the ability of a substance to permit or undergo diffusion
  2. another name for diffusion coefficient
another name for diffusion (sense 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
Cite This Source

Word of the Day

Difficulty index for diffusivity

Few English speakers likely know this word

Word Value for diffusivity

Scrabble Words With Friends

Nearby words for diffusivity