(physics, of a gas or other fluid) A measure of the speed of diffusion. / (figuratively, e.g. of a disease) Capacity for spreading.

In a diffusive manner / With regard to diffusion

plural of diffusivity

plural of diffusibility

plural of diffuseness

diffusibility

(chemistry) Material which, in the process of catalysis, has diffused or passed through the separating membrane.

plural of diffusate

capable of being diffused

The quality of being diffusable.