title: Extraction
text: # Extraction
  
  Extraction may refer to:
  
  ## Science and technology
  
  ### Biology and medicine
  
  * Comedo extraction, 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
  * 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, the computation of a nth 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, the process of recovering petroleum from the ground
  * Ancestry 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, in which a portion of a written work is published
  * A part of the anatomy of a stroke, in rowing
  