Diffusion vs Contagious - What's the difference?
As a noun diffusion
is diffusion (physics: the intermingling of the molecules of a fluid due to random thermal agitation).
As an adjective contagious is
of a disease, easily transmitted to others.
the act of diffusing or dispersing something, or the property of being diffused or dispersed; dispersion
(physics) the scattering of light by reflection from a rough surface, or by passage through a translucent medium
(physics) the intermingling of the molecules of a fluid due to random thermal agitation
the spread of cultural or linguistic practices, or social institutions, in one or more communities
(physics, weather) Exchange of airborne media between regions in space in an apparently random motion of a small scale.
the movement of water vapor from regions of high concentration (high water vapor pressure) toward regions of lower concentration.
Of a disease, easily transmitted to others.
Of a fashion, laughter, etc., easily passed on to others.
- The flu was so contagious that everybody in town got sick!
Of a person, having a disease that can be transmitted to another person by touch.
- Wearing jeans was a contagious fad at that time.
- They were highly contagious , spreading bacteria to other people.
* (of a disease) catching, infectious