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diffusivity

[dif-yoo-siv-i-tee] /ˌdɪf yʊˈsɪv ɪ ti/
noun, Physics.
1.
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
1875-1880
First recorded in 1875-80; diffusive + -ity
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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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

diffusivity

/ˌdɪfjuːˈsɪvɪtɪ/
noun
1.
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
2.
(physics)
  1. the ability of a substance to permit or undergo diffusion
  2. another name for diffusion coefficient
3.
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
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