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Absorption may refer to:


Chemistry and biology

* Absorption (biology), digestion ** Absorption (small intestine) *
Absorption (chemistry) Absorption is a physical or chemical phenomenon or a process in which atoms, molecules or ions enter the liquid or solid bulk phase of a material. This is a different process from adsorption, since molecules undergoing absorption are taken up b ...
, diffusion of particles of gas or liquid into liquid or solid materials *
Absorption (skin) Skin absorption is a route by which substances can enter the body through the skin. Along with inhalation, ingestion and injection, dermal absorption is a route of exposure for toxic substances and route of administration for medication. Absorpti ...
, a route by which substances enter the body through the skin *
Absorption (pharmacology) Absorption is the journey of a drug travelling from the site of administration to the site of action. The drug travels by some route of administration ( oral, topical-dermal, etc.) in a chosen dosage form (e.g., tablets, capsules, or in sol ...
, absorption of drugs into the body


Physics and chemical engineering

*
Absorption (acoustics) In acoustics, absorption refers to the process by which a material, structure, or object takes in sound energy when sound, sound waves are encountered, as opposed to reflection (physics), reflecting the energy. Part of the absorbed energy is t ...
, absorption of sound waves by a material *
Absorption (electromagnetic radiation) In physics, absorption of electromagnetic radiation is how matter (typically electrons bound in atoms) takes up a photon's energy—and so transforms electromagnetic energy into internal energy of the absorber (for example, thermal energy). ...
, 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 absorbing element (or annihilating element) is a special type of element of a set with respect to a binary operation on that set. The result of combining an absorbing element with any element of the set is the 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


See also

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Adsorption Adsorption is the adhesion of atoms, ions or molecules from a gas, liquid or dissolved solid to a surface. This process creates a film of the ''adsorbate'' on the surface of the ''adsorbent''. This process differs from absorption, in which a ...
, the formation of a gas or liquid film on a solid surface * CO2 scrubber, device which absorbs carbon dioxide from circulated gas *
Digestion Digestion is the breakdown of large insoluble food compounds into small water-soluble components so that they can be absorbed into the blood plasma. In certain organisms, these smaller substances are absorbed through the small intestine into th ...
, the uptake of substances by the gastrointestinal tract * Absorption (psychology), a state of becoming absorbed by mental imagery or fantasy *
Flow (psychology) Flow in positive psychology, also known colloquially as being in the zone or locked in, is the mental state in which a person performing some activity is fully immersed in a feeling of energized Attention, focus, full involvement, and enjoyment ...
, a state of total mental "absorption" {{Disambiguation