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Air-entraining admixture
An air-entraining admixture is a surfactant-based chemical added to concrete during mixing to stabilize microscopic air bubbles that protect hardened concrete against freeze-thaw damage; air-entrained concrete is standard in freezing climates.
Air-independent propulsion
Air-independent propulsion (AIP) is a marine propulsion technology, also called an AIP propulsion system, that lets non-nuclear submarines generate electricity underwater without air, using Stirling engines, steam turbines, or fuel cells.
Air-insulated switchgear
Air-insulated switchgear (AIS) is electrical switchgear in which ambient air insulates live conductors from each other and from grounded enclosures, in contrast to gas-insulated switchgear.
Air-liquid interface culture
Air-liquid interface culture is a cell culture method where epithelial cells grow on a porous membrane, basal side in medium and apical side in air, producing differentiated tissue-like epithelia.
Air-sol moyenne portée
Air-sol moyenne portée (ASMP) is a French supersonic ramjet nuclear cruise missile that has armed France's airborne nuclear deterrent since 1986, first on the Mirage IV, today on the Rafale.
Air-source heat pump
An air-source heat pump is a heating and cooling system that moves heat between a building and the outside air, delivering 3 to 4 units of heat per unit of electricity.
Air-to-air missile
An air-to-air missile (AAM) is a guided missile fired from an aircraft to destroy another aircraft or airborne missile, developed from 1943 and first used in combat in 1958.
Air-to-Air Stinger
The Air-to-Air Stinger (ATAS), also designated AIM-92, adapts the shoulder-fired FIM-92 Stinger for launch from helicopters and UAVs, giving aircraft like the OH-58 Kiowa and AH-64 Apache a self-defense and counter-helicopter capability.
Air-to-surface missile
An air-to-surface missile, also known as an air-to-ground missile, is a powered and guided missile launched from an aircraft to strike targets on land or at sea.
Air–fuel ratio
The air–fuel ratio, or air–fuel mixture, is the mass ratio of air to fuel in a combustible mixture, controlling how completely fuel burns and which pollutants an engine emits.
AIR: All India Rankers
AIR: All India Rankers (ఆల్ ఇండియా ర్యాంకర్స్) is a 2025 Telugu coming-of-age web series by Joseph Clinton on ETV Win and Netflix, following three students rebelling against IIT coaching pressure at an elite Vijayawada academy.
Aira Group AB
Aira Group AB is a Stockholm-based clean energy-tech startup, founded in 2022 by Vargas Holding, selling heat pumps on no-upfront-cost monthly plans in Germany, Italy, and the UK.
Aira Shiratori (白鳥愛羅)
Aira Shiratori (白鳥愛羅) is a main character of Yukinobu Tatsu's manga Dandadan, a popular high school girl who inherits Acrobatic Silky's yokai powers, fights with prehensile hair, and loves Okarun unrequited.
Aira Yuuki
Aira Yuuki (結城アイラ), born 1981, is a Japanese anison singer, lyricist, and composer on the Lantis label who debuted in 2007 with the anime sola's opening theme "colorless wind".
Airaa
Airaa (ஐரா) is a 2019 Tamil-Telugu horror film directed by Sarjun KM, starring Nayanthara in her first dual role as Bhavani and Yamuna, with Kalaiyarasan and Yogi Babu; released 28 March 2019, it earned ₹5.21 crore worldwide against a ₹10 crore budget.
Airalo
Airalo is a Singapore-based travel technology company founded in 2019 that operates the world's first eSIM store, selling prepaid mobile data packages for over 200 countries.
AirAsia
AirAsia is a Malaysian low-cost airline group headquartered near Kuala Lumpur, relaunched by Tony Fernandes in December 2001 and serving Southeast Asia and beyond under the slogan "Now everyone can fly."
AirAsia Group
AirAsia Group Berhad, the listed Malaysian low-cost carrier group formed in 2026 from AirAsia X, flies more than 150 destinations and was named Skytrax's best low-cost airline 17 years running.
AirAsia X
AirAsia X Berhad was a Malaysian low-cost airline based in Kuala Lumpur, the long-haul affiliate of AirAsia, which in 2026 became the listed parent of all AirAsia-branded airlines.
Airavata (ऐरावत)
Airavata (ऐरावत) is the white celestial elephant of Hindu myth, king of elephants and Indra's mount; distinct from the naga, asura, Jain region, and temple type of the same name.
Airavatesvara Temple
The Airavatesvara Temple is a 12th-century Hindu temple dedicated to Shiva at Darasuram, Tamil Nadu, built by Chola king Rajaraja II and part of the UNESCO Great Living Chola Temples.
Airbag
An airbag, also known as an SRS airbag, is a vehicle restraint cushion that inflates rapidly in a crash to protect occupants alongside the seat belt.
Airbag (1997 film)
Airbag (1997) is a Spanish black-comedy road movie by Juanma Bajo Ulloa, written with Karra Elejalde and Fernando Guillen Cuervo, about three friends recovering a lost engagement ring; it was Spain's top-grossing film of 1997 and won two Goya Awards.
AirBaltic
AirBaltic is the Latvian flag carrier and the leading airline in the Baltic states, flying an all-Airbus A220-300 fleet from Riga to over 70 destinations.
Airband
Airband, also called the aircraft band, is the portion of the VHF spectrum, 117.975 to 137 MHz, allocated to civil aviation for voice and data communication between aircraft and ground stations.
Airblue (ایئر بلیو لمیٹڈ)
Airblue Limited is a private Pakistani low-cost airline headquartered in Islamabad, founded in 2003, with domestic flights and international service to the UAE and Saudi Arabia.
Airblue Flight 202
Airblue Flight 202 was a Karachi to Islamabad passenger flight that crashed into the Margalla Hills in monsoon weather on 28 July 2010, killing all 152 people aboard.
Airbnb
Airbnb is an online marketplace connecting travelers with hosts offering short-term lodging, earning a fee per booking; it holds about 44% of the global short-term rental market.
Airboat
An airboat, also known as a fanboat or swamp boat, is a flat-bottomed watercraft pushed by an aircraft-style propeller, letting it cross shallow swamps, marshes, and ice.
Airborne (1993 film)
Airborne is a 1993 American teen comedy directed by Rob Bowman about a California teen who wins over Cincinnati classmates through a downhill Rollerblade race.