Absorption

PHYSICAL: Absorption is the phenomenon through which some of the energy produced by electromagnetic or corpuscular radiation is dissipated in a material medium.

PHYSIOLOGY: Absorption is the entry of a substance from the outside to inside a living organism. Intestinal absorption: the passage of nutrients from the intestine into the blood.

CHEMISTRY, PHYSICS. Absorption is the property of solids or liquids to retain some gases or liquids within their volume.