What is Jet?
{{Wiktionary|jet}} '''JET''', '''Jet''' or '''Jets''' all have many meanings. Some of them are: ==Science== *A '''jet''' is a stream of [[liquid]] or [[gas]] which is moving together in parallel. *In [[fluid]] or gas engineering contexts, a '''[[jet (gas)|jet]]''' is a stream of material ejected from a nozzle, or a nozzle designed to produce such a stream. *In automotive terms, a '''jet''' is a tube, nozzle, or passageway through which [[petrol]] is metered within a [[carburetor]]. *In geology, [[jet (lignite)|'''jet''' (lignite)]] (or Whitby jet) is a mineraloid (mineral-like material) which is used as a [[gemstone]]. *In meteorology, a '''[[blue jet]]''' is a form of [[Lightning#Sprites, Elves, Jets and other Upper Atmospheric Lightning|upper atmospheric lightning]]. *In meteorology, a [[Lightening#Sprites.2C_elves.2C_jets.2C_and_other_upper_atmospheric_lightning|'''jet''']] is an [[electrical discharge]] that occurs high above the [[cumulonimbus]] cloud of an active [[thunderstorm]]. *In astrophysics, a '''[[relativistic jet]]''' is a stream of fast-moving plasma emitted at nearly 300,000&nbsp;km/s (the [[speed of light]]) from an [[active galaxy]]. A similar phenomenon on a much smaller scale is a [[polar jet]]. These are emitted during star formation from either side of the [[accretion disk]], along the two polar axes. *In nuclear and particle physics, a [[Jet (particle physics)|'''jet''']] is a cone of [[hadrons]] *In nuclear physics, the [[Joint European Torus]] or '''JET''' is an experimental [[Nuclear fusion]] reactor. *In mathematics, a [[jet (mathematics)|'''jet''']] is an operation that produces an abstract polynomial *In mathematics, a '''[[jet bundle]]''' (or [[spray (mathematics)|spray]]) is a manipulation of [[differential equation]]s *In software engineering, [[Java Emitter Templates]] ('''JET''') is a [[Template engine]] that is part of the Eclipse EMF project. ===Aerospace=== *[[Jet engine]] *[[Jet aircraft]] *[[Jet Airways]], an airline based in India serving domestic and international rout