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diffusivity

[ dif-yoo-siv-i-tee ]

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.


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
“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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Word History and Origins

Origin of diffusivity1

First recorded in 1875–80; diffusive + -ity
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Example Sentences

Its weak links are the unverified assumptions of an initial uniform temperature and a constant 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.

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