Extraction may refer to:

Science and technology

Biology and medicine

Comedo extraction Comedo extraction is a widely used method of treatment for acne vulgaris Acne, also known as ''acne vulgaris'', is a long-term skin condition that occurs when dead skin cells and oil from the skin clog hair follicles. Typical features of t ...

, a method of acne treatment *

Dental extraction A dental extraction (also referred to as tooth extraction, exodontia, exodontics, or informally, tooth pulling) is the removal of teeth from the dental alveolus (socket) in the alveolar bone. Extractions are performed for a wide variety of reaso ...

, the surgical removal of a tooth from the mouth

Computing and information science

Data extraction Data extraction is the act or process of retrieving data out of (usually unstructured or poorly structured) data sources for further data processing or data storage ( data migration). The import into the intermediate extracting system is thus usu ...

, the process of retrieving data out of data sources *

Information extraction Information extraction (IE) is the task of automatically extracting structured information from unstructured and/or semi-structured machine-readable documents and other electronically represented sources. In most of the cases this activity concer ...

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 In information theory, data compression, source coding, or bit-rate reduction is the process of encoding information using fewer bits than the original representation. Any particular compression is either lossy or lossless. Lossless compressi ...

, 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 root ...

, in mathematics, the computation of a th root *

Extraction (chemistry) Extraction in chemistry is a separation process consisting of the separation of a substance from a matrix. Common examples include '' liquid-liquid extraction'', and '' solid phase extraction''. The distribution of a solute between two phas ...

, the separation of a substance from a matrix *

Primary extraction In breechloading firearms, primary extraction is the initial phase (the first few millimeters) of the extraction of a spent casing from the firearm chamber. After the primary extraction comes the secondary extraction where the bolt is moved f ...

, 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 Extractivism is the process of extracting natural resources from the Earth to sell on the world market. It exists in an economy that depends primarily on the extraction or removal of natural resources that are considered valuable for exportation w ...

, 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 wh ...

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 ''Tom Clancy's Rainbow Six Extraction'' (originally known as ''Tom Clancy's Rainbow Six Quarantine'') is an online multiplayer tactical shooter video game developed by Ubisoft Montreal and published by Ubisoft. A spin-off of '' Rainbow Six Siege ...

'', 2022 video game

Other uses

Extraction (military) In military tactics, extraction (also exfiltration or exfil) is the process of removing personnel when it is considered imperative that they be immediately relocated out of a hostile environment and taken to an area either occupied or controlle ...

, 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'' ...