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aeronautics

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aer⋅o⋅nau⋅tics

[air-uh-naw-tiks, -not-iks]
–noun (used with a singular verb)
the science or art of flight.

Origin:
1820–25; < NL aeronautica or F aéronautique; see aero-, nautical, -ics
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To aeronautics
aer·o·nau·tics   (âr'ə-nô'tĭks)   
n.   (used with a sing. verb)
  1. The design and construction of aircraft.

  2. The theory and practice of aircraft navigation.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

aeronautics 
1824, from aeronautic (1784), from Fr. aéronautique, from aéro- (from Gk. aer "air") + nautique "of ships," from L. nauticus, from Gk. nautikos. Originally of balloons.
Online Etymology Dictionary, © 2001 Douglas Harper
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