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.
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- diffusion hypoxia,
- diffusion line,
- diffusion respiration,
- diflorasone diacetate,
Origin of diffusivity
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples 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
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
- the ability of a substance to permit or undergo diffusion
- 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