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lighter-than-air

[lahy-ter-th uh n-air] /ˈlaɪ tər ðənˈɛər/
adjective, Aeronautics
1.
(of an aircraft) weighing less than the air it displaces, hence obtaining lift from aerostatic buoyancy.
2.
of or pertaining to lighter-than-air craft.
Origin
1900-1905
1900-05
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for lighter-than-air
  • lighter-than-air travel, freed from the noisy machinery of airplanes and helicopters, has always been chic.
  • Crew members fore and aft managed to maneuver their still-lighter-than-air sections to the ground, and survived.
  • For seven decades, they were a curiosity, a relic of a lighter-than-air future that never quite came true.
  • In ideal performances, they achieve a lighter-than-air quality.
  • Thus the airship or dirigible--a lighter-than-air craft with propulsion and steering systems--was born.
  • Typical lighter-than-air gases are used in weather balloons and may consist of hydrogen, helium, or natural gas.

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