dif·fu·siv·i·ty

[dif-yoo-siv-i-tee]
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:
1875–80; diffusive + -ity

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World English Dictionary
diffusivity (ˌdɪfjuːˈsɪvɪtɪ) [Click for IPA pronunciation guide]
 
n
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
 a.  the ability of a substance to permit or undergo diffusion
 b.  another name for diffusion coefficient
3.  another name for diffusion

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Diffusivity is always a great word to know.
So is flibbertigibbet. Does it mean:
a chattering or flighty, light-headed person.
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
Example sentences
Conduction tests are used to estimate the formation factor, which can also be related to diffusivity.
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