English
interdiffusion
From inter- + diffusion.
A compound of inter- + diffusion
Proto-Indo-European *h₁én ‘in’
Proto-Indo-European *h₁entér ‘between’
Proto-Italic *n̥ter ‘between’
Latin inter ‘between’
English inter-
Proto-Indo-European *ǵʰewd- ‘to pour’
…
Proto-Italic *hundō ‘to pour out’
Latin fundō ‘to pour out, shed’
Latin diffundō ‘to diffuse, scatter’
Latin diffūsiō ‘spreading out, increase in extent or breadth’
English diffusion
Today it means
noun The mutual diffusion of two fluids, especially through a membrane
Language periods are conventional ranges, not dates for this word.
Etymograph / interdiffusion