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FL or variations may refer to:

Arts and entertainment[edit]

Businesses and organizations[edit]



Science and technology[edit]

Biology and medicine[edit]

Mathematics and computing[edit]

Other uses in science and technology[edit]


  • Fastest lap, in motorsports, the quickest single trip around the track by any driver during a race
  • Federal League, a United States baseball league in 1914
  • Forestay length, in sailing
  • English Football League, an organisation containing Levels 2-4 in the football pyramid, still commonly known as simply the "Football League".

Other uses[edit]

  • (fl), a common typographical ligature
  • FetLife, a social networking site for people interested in BDSM, fetishism and kink
  • Flagship Lounge, the first class lounge of American Airlines
  • Flavius, a gens (family name) or praenomen (personal name) in ancient Rome
  • Flawless, a grade of diamond clarity
  • Floor or storey, a floor level in a building
  • Floruit (Latin, "flourished"), used to indicate periods when a person, organization, or species was influential
  • Foreign language, a human language not spoken in one's native country
  • Fork length, a standard fish measurement
  • Freelancer, a self-employed professional