- diffusion (n.)
[diffusion 词源字典]
- 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)).[diffusion etymology, diffusion origin, 英语词源]