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elevon

[el-uh-von]
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noun Aeronautics.
  1. a control surface functioning both as an elevator and as an aileron.
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Origin of elevon

First recorded in 1940–45; elev(ator) + (ailer)on
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for elevon

elevon

noun
  1. an aircraft control surface that combines the functions of an elevator and aileron, usually fitted to tailless or delta-wing aircraft
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Word Origin

C20: from elev (ator) + (ailer) on
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012