Absorption

Absorption may refer to:

Chemistry and biology

 * Absorption (biology), digestion
 * Absorption (small intestine)
 * Absorption (chemistry), diffusion of particles of gas or liquid into liquid or solid materials
 * Absorption (skin), a route by which substances enter the body through the skin
 * Absorption (pharmacology), absorption of drugs into the body

Physics and chemical engineering

 * Absorption (acoustics), absorption of sound waves by a material
 * Absorption (electromagnetic radiation), absorption of light or other electromagnetic radiation by a material
 * Absorption air conditioning, a type of solar air conditioning
 * Absorption refrigerator, a refrigerator that runs on surplus heat rather than electricity
 * Dielectric absorption, the inability of a charged capacitor to completely discharge when briefly discharged

Mathematics and economics

 * Absorption (economics), the total demand of an economy for goods and services both from within and without
 * Absorption (logic), one of the rules of inference
 * Absorption costing, or total absorption costing, a method for appraising or valuing a firm's total inventory by including all the manufacturing costs incurred to produce those goods
 * Absorbing element, in mathematics, an element that does not change when it is combined in a binary operation with some other element
 * Absorption law, in mathematics, an identity linking a pair of binary operations