AET may refer to:
Aetna Inc. (/ˈɛtnə/; stylized as ætna) is an American managed health care company, which sells traditional and consumer directed health care insurance plans and related services, such as medical, pharmaceutical, dental, behavioral health, long-term care, and disability plans.
Aetosaurs (aetosaur /eɪˌɛtoʊˈsɔːr/; order name Aetosauria /eɪˌɛtoʊˈsɔːriə/; from Greek, ἀετός (aetos, "eagle") and σαυρος (sauros, "lizard")) are an extinct order of heavily armoured, medium- to large-sized Late Triassic herbivorous archosaurs.
According to ancient and medieval science, aether (Greek: αἰθήρ aithēr), also spelled æther or ether, also called quintessence, is the material that fills the region of the universe above the terrestrial sphere.
The Aetherius Society is a millenarian, New Age, UFO religion. It was founded by George King in the mid-1950s as the result of what King claimed were contacts with extraterrestrial intelligences, whom he referred to as “Cosmic Masters”.
Aetolia-Acarnania (Greek: Αιτωλοακαρνανία, Aitoloakarnanía) is one of the regional units of Greece. It is part of the geographic region of Central Greece and the administrative region of West Greece.
The Aeta (Ayta, pronounced /ˈaɪtə/ EYE-tə), or Agta, are an indigenous people who live in scattered, isolated mountainous parts of the island of Luzon, the Philippines.
Aether theories in physics propose the existence of a medium, the aether (also spelled ether, from the Greek word (αἰθήρ), meaning "upper air" or "pure, fresh air"), a space-filling substance or field, thought to be necessary as a transmission medium for the propagation of electromagnetic or gravitational forces.
In the 19th century, the theory of the luminiferous aether as the hypothetical medium for the propagation of light was widely discussed.
Aetiocetus is a genus of extinct basal mysticete, or baleen whale that lived 33.9 to 23.03 million years ago, in the late Oligocene in the North Pacific ocean, around Japan, Mexico, and Oregon, U.S.