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jetavator

[jet-uh-vey-ter]
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noun Rocketry.
  1. an extension of the exhaust nozzle of a rocket, for controlling the direction of the exhaust gases.
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Origin of jetavator

First recorded in 1955–60; jet1 + (el)evator
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018