Extraction may refer to:

Science and technology

Biology and medicine

Comedo extraction Comedo extraction is a widely used method of treatment for acne vulgaris. A dermatologist or cosmetologist may extract blackheads (open comedones) using gentle pressure around the pore opening, and whiteheads (closed comedones) by incision with ...

, a method of acne treatment * Dental extraction, the surgical removal of a tooth from the mouth

Computing and information science

* Data extraction, the process of retrieving data out of data sources * Information extraction *

Knowledge extraction Knowledge extraction is the creation of knowledge from structured (relational databases, XML) and unstructured (text, documents, images) sources. The resulting knowledge needs to be in a machine-readable and machine-interpretable format and must r ...

* The process of reversing data compression, a.k.a. decompression * The process of choosing elements from a source document, in linguistics

Other uses in science and technology

Root extraction In mathematics, a radicand, also known as an nth root, of a number ''x'' is a number ''r'' which, when raised to the power ''n'', yields ''x'': :r^n = x, where ''n'' is a positive integer, sometimes called the ''degree'' of the root. A roo ...

, in mathematics, the computation of a th root * Extraction (chemistry), the separation of a substance from a matrix * Primary extraction, the act of removing a spent cartridge from the chamber of a firearm * Fragrance extraction, the process of obtaining fragrant oils and compounds from raw materials * Resource extraction, the process of locating, acquiring and selling any resource **

Petroleum extraction Petroleum is a fossil fuel that can be drawn from beneath the earth's surface. Reservoirs of petroleum was formed through the mixture of plants, algae, and sediments in shallow seas under high pressure. Petroleum is mostly recovered from oil dr ...

, the process of recovering petroleum from the ground *

Ancestry An ancestor, also known as a forefather, fore-elder or a forebear, is a parent or (recursively) the parent of an antecedent (i.e., a grandparent, great-grandparent, great-great-grandparent and so forth). ''Ancestor'' is "any person from whom ...

or origin of a person

Arts and entertainment

* ''Extraction'' (2015 film), an American thriller film starring Kellan Lutz, Bruce Willis, and Gina Carano * ''Extraction'' (2020 film), an American action film starring Chris Hemsworth * ''Extraction'' (album), by guitarist Greg Howe * "Extraction" (''The Shield''), an episode of the television series * '' Dead Space: Extraction'', a video game prequel to the 2008 game ''Dead Space'' * "Extractions", a song by BS 2000 on the 2001 album '' Simply Mortified'' * ''Dirty Bomb'' (video game), formerly known as ''Extraction'' * '' Tom Clancy's Rainbow Six Extraction'', 2022 video game

Other uses

* Extraction (military), the removal of someone from a hostile area to an area occupied by either friendly personnel or within friendly control *

Literary extract Literary fragments may comprise: * works inadvertently left unfinished or never completed by their authors * surviving extracts of larger works subsequently lost as wholes * works deliberately constructed as fragmentary pieces The deliberately und ...

, in which a portion of a written work is published * A part of the

anatomy of a stroke In rowing, the stroke is the action of moving the oar through the water in order to propel the boat forward. The two fundamental reference points in the stroke are the ''catch'' where the oar blade is placed in the water, and the ''extraction'' (a ...