Occlusion of gases

(Chem. & Physics) the phenomenon of absorbing gases, as exhibited by platinum, palladium, iron, or charcoal; thus, palladium absorbs, or occludes, nearly a thousand times its own volume of hydrogen, and in this case a chemical compound seems to be formed.

See also: Occlusion

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.