# Absorption

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**Absorption** may refer to:

## Chemistry and biology

- [Absorption (biology)](/source/Absorption_(biology)), digestion - [Absorption (small intestine)](/source/Absorption_(small_intestine))
- [Absorption (chemistry)](/source/Absorption_(chemistry)), diffusion of particles of gas or liquid into liquid or solid materials
- [Absorption (skin)](/source/Absorption_(skin)), a route by which substances enter the body through the skin
- [Absorption (pharmacology)](/source/Absorption_(pharmacology)), absorption of drugs into the body

## Physics and chemical engineering

- [Absorption (acoustics)](/source/Absorption_(acoustics)), absorption of sound waves by a material
- [Absorption (electromagnetic radiation)](/source/Absorption_(electromagnetic_radiation)), absorption of light or other electromagnetic radiation by a material
- Absorption air conditioning, a type of [solar air conditioning](/source/Solar_air_conditioning)
- [Absorption refrigerator](/source/Absorption_refrigerator), a refrigerator that runs on surplus heat rather than electricity
- [Dielectric absorption](/source/Dielectric_absorption), the inability of a charged capacitor to completely discharge when briefly discharged

## Mathematics and economics

- [Absorption (economics)](/source/Absorption_(economics)), the total demand of an economy for goods and services both from within and without
- [Absorption (logic)](/source/Absorption_(logic)), one of the rules of inference
- [Absorption costing](/source/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](/source/Absorbing_element), in mathematics, an element that does not change when it is combined in a binary operation with some other element
- [Absorption law](/source/Absorption_law), in mathematics, an identity linking a pair of binary operations

## See also

- [Adsorption](/source/Adsorption), the formation of a gas or liquid film on a solid surface
- [CO2 scrubber](/source/Carbon_dioxide_scrubber), device which absorbs carbon dioxide from circulated gas
- [Digestion](/source/Digestion), the uptake of substances by the gastrointestinal tract
- [Absorption (psychology)](/source/Absorption_(psychology)), a state of becoming absorbed by mental imagery or fantasy
- [Flow (psychology)](/source/Flow_(psychology)), a state of total mental "absorption"

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Adapted from the Wikipedia article [Absorption](https://en.wikipedia.org/wiki/Absorption) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Absorption?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.