adsorption

ad·sorp·tion

noun \ad-ˈsȯrp-shən, -ˈzȯrp-\

Definition of ADSORPTION

: the adhesion in an extremely thin layer of molecules (as of gases, solutes, or liquids) to the surfaces of solid bodies or liquids with which they are in contact — compare absorption

— ad·sorp·tive \-ˈsȯrp-tiv, -ˈzȯrp-\ adjective

Origin of ADSORPTION

ad- + aboutsorption

First Known Use: 1882

ad·sorp·tion

noun \ad-ˈsȯrp-shən, -ˈzȯrp-\   (Medical Dictionary)

Medical Definition of ADSORPTION

: the adhesion in an extremely thin layer of molecules (as of gases, solutes, or liquids) to the surfaces of solid bodies or liquids with which they are in contact—compare absorption

—ad·sorp·tive \-ˈsȯrp-tiv, -ˈzȯrp-\ (audio pronunciation) (audio pronunciation) (audio pronunciation) adjective

adsorption

noun    (Concise Encyclopedia)

Capability of a solid substance (adsorbent) to attract to its surface molecules of a gas or solution (adsorbate) with which it is in contact. Physical adsorption depends on van der Waals forces of attraction between molecules and resembles condensation of liquids. In chemical adsorption (often called chemisorption; see catalysis), the gas is held to the surface by chemical forces specific to the chemicals involved, and formation of the bond may require an activation energy.