One of the mysteries of the English language finally explained.
Diffusion of gas, especially through a porous wall or membrane; a technique based on this, used for partially separating the gases in a mixture, especially in order to enrich uranium for use as a nuclear fuel. Frequently attributive Compare "diffusion".
Mid 19th century. From gaseous + diffusion.
gaseous diffusion/ˌɡeɪsɪəs dɪˈfjuːʒn//ˌɡasɪəs dɪˈfjuːʒn/
In this article we explore how to impress employers with a spot-on CV.