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heavier than air

 - 1 dictionary result

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.
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