FL

FL or variations may refer to:

Businesses and organizations

• FL, IATA code of Fly Lili (founded 2021), a Romanian airline
• FL, IATA code of AirTran Airways (1993–2014), a former American airline
• FL Group, an Icelandic investment company
• Foot Locker (NYSE ticker symbol), retailer

Numismatics

• Florin (disambiguation), various coins
• Guilder, various coins also sometimes called "florin"

Places

• FL, the United States Postal Service abbreviation for the state of Florida
• FL, an abbreviation for German: Fürstentum Liechtenstein, lit. 'Principality of Liechtenstein', a country in Europe

Science and technology

Biology and medicine

• Feminization laryngoplasty, gender-affirming surgery to raise the pitch of the voice
• FLT3LG (Fms-related tyrosine kinase 3 ligand), a protein
• Fluffy transcription factor, an asexual sporulation gene of Neurospora crassa
• Fluorouracil (5-FU), and leucovorin (folinic acid), a chemotherapy regimen
• Follicular lymphoma, a type of cancer
• Frontal lobe, a part of the brain

Mathematics and computing

• FL (complexity), a class of function problems
• FL (programming language), created at IBM in the 1980s
• FL Studio, music production software

Other uses in science and technology

• Femtolitre, a unit of volume
• Flerovium, symbol Fl, a chemical element (atomic number 114)
• Flight level, of an aircraft
• "Fluid", as in fluid ounce (fl oz)
• Foot-lambert, a unit of luminance
• Friedmann–Lemaître metric in cosmology

Sport

• Federal League, a 1913–1915 US baseball league
• English Football League

Genealogy

• Floruit (abbreviated fl.), a prefix for the time period during which someone was active

Other uses

• fl, a typographical ligature
• Flavius, a family or personal name in ancient Rome
• Flawless, a grade of diamond clarity
• Fork length, a standard fish measurement
• Free List (Liechtenstein), a political party
• Volvo FL, a truck
• Front Left speaker in 5.1 surround sound

See also

• FLS (disambiguation)