Jet Stream

Science / Weather / Jet Stream: An area of strong winds that are concentrated in a relatively narrow band in the upper troposphere of the middle latitudes and subtropical regions of the Northern and Southern Hemispheres. Flowing in a semi-continuous band around the globe from west to east, it is caused by the changes in air temperature where the cold polar air moving towards the equator meets the warmer equatorial air moving polarward. It is marked by a concentration of isotherms and strong vertical shear.
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Other Words for Stream

Stream Verb Synonyms: flow, rush, swarm, tide, flood, deluge, succession, series, row, line, string, chain, barrage, queue
Stream Noun Synonyms: brook, brooklet, streamlet, rivulet, tributary, river, freshet, run, watercourse, waterway, channel, literary rill, runnel, N beck, burn, NE except in placenames kill, creek, branch
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Ramjet

Technology / Aviation / Ramjet: An aerodynamic duct in which fuel is burned to produce a high-velocity propulsive jet. It needs to be accelerated to high speed before it can become operative. MORE

Polar Jet

Science / Weather / Polar Jet: Marked by a concentration of isotherms and strong vertical shear, this jet is the boundary between the polar air and the subtropical air. It often divides into two branches, the north and the south, a MORE

Scramjet

Technology / Aviation / Scramjet: Acronym for supersonic combustion ramjet, in which combustion occurs at supersonic air velocities through the engine. MORE