diffusivity (difusiviti)

[ See diffuser . The diffusivity of one substance in another is the number of units of the substance which pa in unit of time through unit of surface. Tait , Properties of Matter, p. 257. diffusor (di-fü'zor), n. dig (dig), v.; pret. and pp. dug or digged , ppr. ime) rime dret (pret. diggede, digged , digged ), (through Dan. influence?) from digenesis