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init. (context astrophysics English) third Lagrange point, located 180-degrees behind or ahead on the orbit of the smaller object in orbit around a larger one, diametrically opposed to the smaller object


L3, L03, L.3 or L-3 may refer to:


  • L3 (CERN), one of the four detectors of the Large Electron-Positron Collider
  • L3 microkernel, a persistent microkernel operating system by German computer scientist Jochen Liedtke, and the predecessor of the L4 microkernel family
  • L-3, an L-carrier cable system developed by At&T
  • The Level-3 CPU cache in a computer
  • The third Lagrange Point in a Solar System
  • The third lumbar vertebra of the vertebral column, in human anatomy
  • L3, form of low-alloy special purpose steel
  • ISO/IEC 8859-3 (Latin-3), an 8-bit character encoding


  • L3/33 and L3/35, Italian tankettes used in World War II
  • L-3 Communications, a company providing intelligence, surveillance, and reconnaissance systems
  • L-3 Aviation Recorders, a Sarasota, Florida-based manufacturer of flight data recorders
  • L-3 Flight International Aviation, an airline based in Newport News, Virginia, USA
  • L-3 Network Security, a network security company in the United States
  • ATC code L03Immunostimulants, a subgroup of the Anatomical Therapeutic Chemical Classification System
  • Aeronca L-3 Grasshopper, a light airplane used by the USAAF during World War II
  • Avia L.3, an Italian plane used for training by the Regia Aeronautica
  • Haplogroup L3 (mtDNA), a human mitochondrial DNA (mtDNA) haplogroup generally found in East Africa
  • Macchi L.3, a 1916 Italian biplane flying boats
  • N1/L3, a Soviet space program
  • Soviet submarine L-3, a 1931 Leninets class minelayer submarine
  • Soyuz 7K-L3, a manned lunar lander design type in Russia's Soyuz space program
  • SP&S Class L-3, an 1883 steam locomotives class
  • L (length^3), volume.
  • L3 : the IATA code for DHL De Guatemala, a cargo airline based in Guatemala
  • L3 : the IATA code for LTU Austria, an airline based in Austria
  • L03 : a Chevrolet Small-Block engine model
  • Latitude/Longitude Locator, an STS-32 Space Shuttle mission experiment
  • Live, Loud & Local, a show launched by band The Matches in the Oakland, California region
  • Leprechaun 3, film
  • L3, a third year law school student
  • L3, the third lumbar vertebra
L3 (text speech)

"L3" in text speech means "Live, Love, Laugh." People use it usually at the end of their message as part of their signature.

It is not easy to pinpoint when the use of "L3" in text and emails began, but it is usually meant as a way to wish someone well. Telling them to live life to the fullest, by loving and laughing each day. Although there is no real way to identify its origins, it is purposed that it was created from famous posters, bumper stickers, and framed pictures that state "Live well, Love much, Laugh often" this statement simply condensed to the simple keys L3.

Category:Internet slang Category:Mobile phone culture