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heavier-than-air

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heav⋅i⋅er-than-air

[hev-ee-er-thuhn-air]
–adjective
(of an aircraft) weighing more than the air that it displaces, hence having to obtain lift by aerodynamic means.

Origin:
1900–05
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To heavier-than-air
heav·i·er-than-air   (hěv'ē-ər-thən-âr')
adj.  Of, relating to, or being an aircraft heavier than the air it displaces.
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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