late 14c., from Latin diffusionem (nominative diffusio) "a pouring forth," noun of action from past participle stem of diffundere "scatter, pour out," from dis- "apart, in every direction" (see dis-) + fundere "pour" (see found (v.2)).
1. There are data on the rates of diffusion of molecules.
2. The invention of printing helped the diffusion of learning.
3. This phenomenon , peculiar to the two - dimensional wave motion, is sometimes called diffusion.
4. This regime is termed mass transport or diffusion limited.
5. The effect of the diffusion capacitance can be troublesome.