nonrigid adj. (Aeronautics) Not rigid; especially, designating an airship having a shape maintained only by internal gas pressure and without a supporting structure. Opposite of rigid.
... matter of airships, Germany was markedly favored by the possession of the Zeppelin type, whose speed and endurance is still unequaled by the smaller, nonrigid dirigibles which constitute the chief bulk of the British, French, Italian, and Russian ... — The Story of the Great War, Volume IV (of 8) • Francis J. (Francis Joseph) Reynolds, Allen L. (Allen Leon)
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