diffusivity Physics.
(dɪfjuːˈsɪvɪtɪ)
[f. diffusive + -ity. Cf. activity, conductivity.]
Diffusive quality; capacity of diffusion (as a measurable quality of liquids, gases, heat, etc.); = diffusibility.
| 1876 Tait Rec. Adv. Phys. Sc. xi. 280 We may speak of the diffusivity of one substance in solution in another. 1881 Everett Deschanel's Nat. Philos. xxxv. 413 ‘Diffusivity’ (to use the name recently coined by Sir Wm. Thomson) measures the tendency to equalization of temperature. 1882 Nature XXVI. 567 ‘Diffusivity’, that is..conductivity divided by thermal capacity of unit volume. |