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 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 reas ...

, 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 usual ...

, 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 ...

* 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 A source document is a document in which data collected for a clinical trial is first recorded. This data is usually later entered in the case report form. The International Conference on Harmonisation of Technical Requirements for Registration ...

, in linguistics

Other uses in science and technology

* Root extraction, 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 (chemical analysis), matrix. The distribution of a solute between two phases is an Chemical equilibrium, equilibrium condition describe ...

, 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 Natural resources are resources that are drawn from nature and used with few modifications. This includes the sources of valued characteristics such as commercial and industrial use, aesthetic value, scientific interest, and cultural value. ...

, 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 are formed through the mixture of plants, algae, and sediments in shallow seas under high pressure. Petroleum is mostly recovered from oil d ...

, 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 ...

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 * "Extraction" (''Star Wars: The Bad Batch'') * '' 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 ''Simply Mortified'' is the second and final studio album by American rock duo BS 2000. It was released on February 6, 2001 through Grand Royal. Recording sessions took place at The Dungeon in New York. Production was handled by members Ad-Rock ...

'' * ''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 is the process of removing personnel or units from an area; when conducted with stealth in an area controlled by the enemy it is referred to as exfiltration. An example of a hostile extraction was Battle of ...

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

Literary extract A literary fragment is a piece of text that may be part of a larger work, or that employs a 'fragmentary' form characterised by physical features such as short paragraphs or sentences separated by white space, and thematic features such as discon ...

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

anatomy of a stroke In rowing (sport), 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 ''extrac ...