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Mid-air collision
A mid-air collision is an accident in which two or more aircraft collide while both are airborne, most often near an airport when one overtakes another.
Mid-Atlantic Aviation Partnership
The Mid-Atlantic Aviation Partnership (MAAP) is an FAA-designated drone test site led by Virginia Tech, one of six original sites formed by Virginia, Maryland, and New Jersey in 2013.
Mid-Atlantic Clean Hydrogen Hub
The Mid-Atlantic Clean Hydrogen Hub (MACH2) is one of seven clean hydrogen hubs chosen by the US Department of Energy in 2023, covering Pennsylvania, Delaware, and New Jersey.
Mid-Atlantic Regional Spaceport, Wallops Island, Virginia
The Mid-Atlantic Regional Spaceport (MARS) is a commercial spaceport on Wallops Island, Virginia, operated by the Virginia Spaceport Authority, which supplies the International Space Station and launches Antares and Electron rockets.
Mid-engine design
Mid-engine design, also called the mid-engine layout, places a vehicle's engine between the front and rear axles for handling balance, rare in mainstream cars until the 2020 Corvette C8.
Mid-Infrared Instrument
The Mid-Infrared Instrument (MIRI) is a camera and spectrograph on the James Webb Space Telescope that observes mid-infrared light at wavelengths from 4.9 to 28.8 micrometers.
Mid-Range Gas Gun
The Mid-Range Gas Gun (MRGG) is a US Special Operations Command program for two gas-operated rifles chambered in 6.5mm Creedmoor: the Geissele MRGG-S and the LMT MK24.
Mid-size car
A mid-size car, or intermediate car, is a passenger vehicle larger than a compact car and smaller than a full-size car, the US class of the Toyota Camry and Honda Accord.
Mid-size pickup truck
A mid-size pickup truck is a pickup between compact and full-size in size and capacity, typically towing 3,500 to 7,700 pounds; models include the Toyota Tacoma and Ford Ranger.
MIDAL Gas Pipeline
The MIDAL Gas Pipeline, also called the Emden-Karlsruhe Pipeline, is a natural gas pipeline in Germany running from Bunde to Ludwigshafen since 1993, operated by GASCADE.
Midcontinent Express Gas Pipeline
The Midcontinent Express Pipeline (MEP) is a 500-mile FERC-regulated interstate natural gas pipeline running from Bennington, Oklahoma, to Butler, Alabama, owned by Kinder Morgan and Energy Transfer.
Midcontinent Independent System Operator, Inc.
The Midcontinent Independent System Operator (MISO) is a not-for-profit organization that runs the high-voltage grid and wholesale power markets across 15 US states and Manitoba, serving about 42 million people from Carmel, Indiana.
Middelgrunden
Middelgrunden is an offshore wind farm 3.5 km from Copenhagen, Denmark, with 20 turbines totaling 40 MW, built in 2000 as the world's largest offshore wind farm and the first community-owned one.
Middle Bridge
Middle Bridge: name shared by several historic bridges, chiefly Robert Mylne's Grade I listed 1782-84 stone arch over the River Test at Romsey, Hampshire; also bridges in Basel, Mississauga, the Tower of London, and Missouri.
Middle East Airlines (طيران الشرق الأوسط)
Middle East Airlines, formally Middle East Airlines – Air Liban, is the flag-carrier airline of Lebanon. Founded in 1945, it is a SkyTeam member based in Beirut.
Middle Rio Grande Project
The Middle Rio Grande Project is a U.S. Bureau of Reclamation project in central New Mexico, authorized in 1948 to rehabilitate irrigation works and stabilize the Rio Grande.
Middleby
The Middleby Corporation, known as Middleby, is an American manufacturer of commercial foodservice and food processing equipment headquartered in Elgin, Illinois, tracing its origins to an 1888 oven company.
Middlesex Canal
The Middlesex Canal was a 27-mile waterway in Massachusetts, built between 1793 and 1803 to connect the Merrimack River near Lowell with Boston, operating until 1853.
Middleton Place
Middleton Place is a National Historic Landmark plantation on the Ashley River near Charleston, South Carolina, home to America's oldest landscaped gardens, begun in 1741, and the seat of the Middleton family.
Middleware
Middleware is software that sits between applications and the operating system or network, enabling the parts of a distributed system to communicate and manage data. The term first appeared in the late 1980s.
Midea Group (美的集团)
Midea Group (美的集团) is a Chinese manufacturer of home appliances, robotics, and building technology, the world's largest home appliance company, founded by He Xiangjian in 1968.
Midget submarine
A midget submarine, also called a mini submarine, is a very small submarine carrying about four crew, used to attack enemy warships or for covert missions.
MIDI
MIDI, or Musical Instrument Digital Interface, is a specification that lets musical instruments, computers, and lighting controllers exchange performance information such as notes and program changes.
Midjourney
Midjourney, also known as Midjourney.com, is a generative AI service creating images and video from text prompts, founded by David Holz in San Francisco in 2021.
Midjourney v5
Midjourney v5 is version 5 of Midjourney's text-to-image model, released in March 2023 as an alpha for subscribers through Discord, whose photorealistic output set off the public debate over AI images passing as real photographs.
Midjourney v6
Midjourney v6 is a text-to-image model from the company Midjourney, released in alpha on December 20, 2023, and the service's default model from February 2024 until v6.1 replaced it in July 2024.
Midjourney v7
Midjourney v7 is a text-to-image model released in alpha by Midjourney on April 3, 2025, featuring Draft Mode, default personalization, and Omni Reference for consistent characters.
Midland cogeneration Venture
Midland Cogeneration Venture (MCV) is a natural gas-fired cogeneration plant in Midland County, Michigan, converted from an abandoned nuclear project and generating 1,633 MW of electricity since 1990.
Midland Crude Oil
Midland crude oil, usually called WTI Midland, is unblended light sweet crude from the Permian Basin delivered at Midland, Texas, and since 2023 a grade in the Dated Brent benchmark.
Midland Main Line
The Midland Main Line (MML) is a UK railway running from London St Pancras to Sheffield via Leicester and Derby, opened in 1870 and operated by East Midlands Railway.