chemisorption

noun
che·mi·sorp·tion | \ˌkem-i-ˈsȯrp-shən, ˌkē-mi-, -ˈzȯrp- \

Medical Definition of chemisorption 

: the usually irreversible process of the atoms in a surface (as of a solid) forming chemical bonds with molecules that come in contact with them chemisorption of gaseous nitrogen on iron catalysts

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