Absorption

Absorption may refer to:

Chemistry and biology

 * Absorption (chemistry), absorption of particles of gas or liquid in liquid or solid material
 * Absorption (skin), a route by which substances can enter the body through the skin
 * Absorption (pharmacokinetics), absorption of drugs in body

Physics and mechanical engineering

 * Absorption (electromagnetic radiation), absorption of light or other electromagnetic radiation by a material
 * Absorption (acoustics), absorption of sound waves by a material
 * Dielectric absorption, a determination of how electrically permitive a material is
 * Absorption refrigerator, a refrigerator that runs on surplus heat rather than electricity
 * Absorption air conditioning, a type of solar air conditioning

Mathematics and economics

 * Absorption law, in mathematics, an identity linking a pair of binary operations
 * Absorption (economics), the total demand of an economy for goods and services both from within and without