diffusion
UK[dɪˈfjuːʒn̩]US[dɪˈfjuʒən]
n
The process by which particles of a liquid, gas, or other substance spread out and mix with another substance, moving from an area of high concentration to an area of low concentration.
n
The spread of cultural elements, ideas, or innovations from one society or region to another.
Morpheme Breakdown
dif
fus
ion
dif
apart, in different directions
fus
pour
ion
noun suffix
Etymology
The word 'diffusion' originates from the Latin 'diffusionem', the noun of action from the verb 'diffundere', meaning 'to pour out or away, to spread, to scatter'. This verb is itself composed of the prefix 'dis-' (apart) and 'fundere' (to pour). The core image is one of a liquid being poured out so that its particles flow apart and mingle with their surroundings. This literal sense of physical spreading was extended metaphorically to describe the spreading of light, knowledge, ideas, and cultural practices. The modern scientific and sociological meanings retain this fundamental logic of a substance or influence dispersing from a central point to a wider area.
Analysis
Structure: dif (apart, in different directions) + fus (pour) + ion (noun suffix)
- dif: A variant of the Latin prefix 'dis-', meaning 'apart', 'asunder', or 'in different directions'. It assimilates to 'dif-' before 'f'.
- fus: From the Latin root 'fundere', meaning 'to pour', 'to melt', or 'to spread'.
- ion: A suffix of Latin origin used to form nouns denoting an action, process, or its result.
Examples
The diffusion of perfume molecules through the air filled the entire room.
The rapid diffusion of smartphone technology has transformed global communication.
In biology, oxygen enters cells through the process of diffusion across the membrane.