M3

M3, M-3 or M03 may refer to:

• M3 (economics), a measure of the money supply
• Metribolone
• M3, an ISO metric screw thread size

Science

• Cubic meter (m³), a unit of volume
• Messier 3 (M3), a globular cluster in the constellation Canes Venatici
• M3 Receptor, an acetylcholine muscarinic receptor
• ATC code M03 Muscle relaxants, a subgroup of the Anatomical Therapeutic Chemical Classification System
• M₃, the minimal modular, but non-distributive lattice in mathematical order theory

Computers and electronics

• Leica M3, a landmark 35mm rangefinder camera
• Modula-3 (M3), a programming language
• M3, a British peak programme meter standard used for measuring the volume of audio broadcasts
• M3, amateur Radio callsign prefix in the United Kingdom
• Macro processor m3 written by Dennis Ritchie for the AP-3 minicomputer. m3 is the predecessor to m4.

Entertainment

• M3 adapter, a Game Boy Advance movie player
• M3 Music Card, a 2007 Chinese company Meizu Flash-based MP3 player
• Metroid 3
• Mother 3
• M3 Simply, see Nintendo DS storage devices#R4DS and M3 DS Simply
• M3 Real, see Nintendo DS storage devices#R4DS and M3 DS Simply
• M3: Malay Mo Ma-develop, a Philippine TV series.
• The Mummy: Tomb of the Dragon Emperor, the third Mummy film
• M3 (comics), a comic book, published in the United States.
• M3 (Canadian TV channel), a music and entertainment television channel
• M3: Sono Kuroki Hagane, an anime TV series

Transport

Road transport

• BMW M3, a high-performance compact executive car produced by German automaker BMW
• M3 (railcar), a railcar used by the Long Island Rail Road and Metro-North Railroad, United States
• Miles M.3 Falcon, a 1930s British four-seat cabin monoplane
• ABSA - Aerolinhas Brasileiras's IATA airline designator
• M3 (New York City bus), a New York City Bus route in Manhattan
• Route M-3 (MTA Maryland), a former bus route in Baltimore, Maryland

Roads

• M-3 (Michigan highway), a state highway in the Detroit metropolitan area
• M3 road (Cape Town), an expressway in Cape Town, South Africa
• M3 motorway (Great Britain), a motorway in England
• M3 motorway (Hungary), a motorway in Hungary
• M3 motorway (Northern Ireland), an urban motorway in Belfast, Northern Ireland
• M3 motorway (Pakistan)
• M3 highway (Russia), another name for the Ukraine Highway in Russia
• Highway M03 (Ukraine)
• M3 freeway or Eastern Freeway (Melbourne) and EastLink (Melbourne) in Victoria, Australia
• M3 Motorway, a tolled motorway alternative running parallel to the N3 road (Ireland)

Rail transport

• LCDR M3 class, a steam locomotive class of the London, Chatham & Dover Railway
• M1/M3 (railcar), a Long Island Rail Road and Metro-North Railroad railcar
• Sri Lanka Railways M3, a diesel-electric locomotive class of Sri Lanka Railways

Rail routes

• Bucharest Metro Line M3, Romania
• M3 (Istanbul Metro)
• Milan Metro Line 3
• Line 3 (Budapest Metro), the third line of Budapest Metro, Hungary

Music

• M3 Records, a record label
• Major third (M3), a type of musical interval
• Major-thirds tuning (M3 tuning), a regular tuning with major-third intervals between successive strings.
• Minor third (m3), a type of musical interval
• M3 (album), an album by Mushroomhead
• M3 (band), an American rock band
• M3, a band that featured former Whitesnake members Bernie Marsden, Micky Moody, and Neil Murray
• Korg M3, a workstation synthesizer

Military

Weapons

• 37 mm Gun M3, a light American anti-tank gun
• 105 mm Howitzer M3, an American light artillery piece
• Benelli M3 Super 90, an Italian semi-automatic shotgun
• .50 M3 machine gun, a variant of the M2HB Browning machine gun
• M3 Fighting Knife a World War II American issue knife
• M3 submachine gun (AKA: Grease Gun), an American submachine gun,
• M3, a code name for a United States military mission at Roosevelt Roads Naval Station in Puerto Rico
• M3 20mm cannon, a United States development of the Hispano-Suiza HS.404

Vehicles

• M3 Amphibious Rig, a German self-propelled amphibious bridging vehicle
• M3 Bradley, an American infantry fighting vehicle
• M3 Grant, a medium tank that was a variant of the M3 Lee
• M3 Half-track, an armored military vehicle
• M3 Lee, an American medium tank
• Panhard M3 PTT, a French armored personnel carrier
• M3 Scout Car, an American armored vehicle
• M3 Stuart, an American light tank
• MSwMS M3, a Swedish Navy mine sweeper (1940–1955)

Accessory

• M3 tripod, a modern tripod for the M2 Browning machine gun

See also

• 3M (disambiguation)
• M1903 (disambiguation)