L (disambiguation)

L, or l, is the twelfth letter of the English alphabet.

L or l may also refer to:

Units of measurement and currency

• L, Langmuir (unit), a unit of exposure to a surface
• L, length in general (often the longest dimension, as opposed to width, height, or depth)
  • Horse length, used in horse racing
  • Boat length, used in rowing
• L, l or ℓ, litre unit
• Ancient Roman libra (translated as "pound"), a weight measure with derivative units denoted with "L" or a derived character:
  • Pound (currency), a number of currencies from the British Empire, abbreviated £ or (historically) "l", "L", or "${\displaystyle {\mathfrak {L}}}$". (Some fonts use a two-bar version resembling the lira sign ₤.)
  • Livre (disambiguation), a number of currencies from the French Empire, with the original abbreviated "£", "₶", or "lt"
  • Lira, a number of currencies from Italy and the Ottoman Empire, abbreviated as ₤
• Leaf (books) ("l." or ℓ), an alternate numbering for books, in contrast to "p." for pages
• Specification for a line of text, for example "l. 3" is the third line of text

Science

Mathematics

• ${\displaystyle L}$, constructible universe, a particular class of sets which can be described entirely in terms of simpler sets
• L--function
• ${\displaystyle {\mathcal {L}}}$, Laplace transform
• ${\displaystyle {\mathcal {L}}}$, likelihood function
• ℓ^p space, the space of sequences with a finite p-norm
• L^p space, a function space defined using a natural generalization of the p-norm for finite-dimensional vector spaces

Computing

• L (complexity), a complexity class in computational complexity theory
• L-notation, used for running times of subexponential algorithms
• L – A Mathemagical Adventure, a 1984 computer game
• Android L, code name for Android Lollipop

Physics

• Angular momentum
• Inductance, the ratio of the magnetic flux to the current in an electrical circuit
• Latent heat
• Luminosity
• Mean free path, the average distance traveled by a moving particle between successive collisions
• Class L, a stellar classification
• Galactic longitude (l), in the galactic coordinate system

Chemistry

• l, abbreviation for liquid
• Avogadro constant, in some German scientific literature
• Leucine, an α-amino acid
• _L- prefix, a levorotatiory compound
• Lewisite, a blister agent

Biology

• Carl Linnaeus, in botanist author citations (L.)
• Haplogroup L (Y-DNA)
• Vertebra in the lumbar region of the spinal cord
• ATC code L Antineoplastic and immunomodulating agents, a section of the Anatomical Therapeutic Chemical Classification System

Meteorology

• Low-pressure area

Music

• L (French singer), French singer-songwriter
• L (entertainer), vocalist of Korean boy band Infinite
• L Marshall, British singer credited as L on the Wretch 32 song "Traktor"
• Lesure Number, music catalogue identifier for the compositions of Claude Debussy
• L Number, classification of the compositions of Franz Benda according to the catalogue of Douglas A. Lee

Albums

• L (Godley & Creme album) (1978)
• L (Ayumi Hamasaki EP) (2010)
• L (Steve Hillage album) (1976)
• L (Candy Lo EP) (2008)
• L (Moe album) (2000)

Vehicles and transportation

• L (Los Angeles Railway)
• Chicago "L", a rapid transit system in Chicago
• L (New York City Subway service)
• L Line (Los Angeles Metro)
• L (SEPTA Metro)
• Transilien Line L, a line of the Paris transport network
• The official West Japan Railway Company service symbol for:
  • Maizuru Line.
  • Uno Line.
• L-plate, a plate for learning drivers under instruction
• L Taraval (San Francisco Muni)
• Nissan L engine
• L, the low gear of an automatic transmission
• LB&SCR L class, a British tank locomotive on the London, Brighton, and South Coast Railway

Companies and organisations

• L. Inc., California-based corporation that makes organic personal care products
• Liberals (Sweden), a political party in Sweden
• Loews Corporation, by NYSE ticker symbol
• Miscellaneous, when used as the fifth letter or behind-the-dot notation on the NASDAQ and NYSE ticker symbols

Language and literature

• L, the Roman numeral representing the number 50
• [ʟ], the velar lateral approximant (IPA notation)
• [l], the alveolar lateral approximant (IPA notation)
• The Cyrillic palochka (ӏ)
• Ḷ, a letter derived from L with a diacritical dot below
• The "low" or common language in a diglossia
• ${\displaystyle {\mathfrak {L}}}$, a siglum for the Vetus Latina version of the Bible
• L (novel), a 1999 novel by Erlend Loe
• L (Death Note), a character from the Death Note manga series

Places

• L postcode area, for Liverpool
• L Island, former name for Scawfell Island, Queensland, Australia
• L, the military time zone code for UTC+11:00

Other uses

• Lucius (praenomen), a Roman praenomen
• Left (direction)
• L, a rating of the Brazilian advisory rating system
• L (film), a 2012 Greek film
• L, production code for the 1965 Doctor Who serial The Rescue
• Canon L lens
• L, symbol for basic provability logic

See also

• All pages with titles beginning with L
• All pages with titles containing L
• Big L (disambiguation)
• L band (disambiguation)
• L class (disambiguation)
• El (disambiguation)
• Lagrangian (disambiguation)
• Loser (hand gesture)