The Collaborative International Dictionary
Occlusion of gases
Occlusion \Oc*clu"sion\, n. [See Occlude.]
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The act of occluding, or the state of being occluded.
Constriction and occlusion of the orifice.
--Howell. -
(Med.) The transient approximation of the edges of a natural opening; imperforation.
--Dunglison.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.