diffusion

Definition

noun

the process of spreading out

Example Gas from the turbine enters the exhaust system at high velocities but, because of high friction losses, the speed of flow is decreased by diffusion.
(Chemistry)
a means of transferring doping materials into an integrated circuit substrate
(Physics)
the spreading of gas or light
(Chemistry)
the mixing of a liquid with another liquid, or of a gas with another gas
(Chemistry)
the passing of a liquid or gas through a membrane