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ruddevator

[ruhd-uh-vey-ter]
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noun Aeronautics.
  1. a control surface functioning both as a rudder and as an elevator.

Origin of ruddevator

First recorded in 1960–65; rudd(er) + (el)evator
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018