[ lon-jer-uhn ]
/ ˈlɒn dʒər ən /
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noun Aeronautics.

a main longitudinal brace or support on an airplane.



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Origin of longeron

1910–15; <French: side-piece, equivalent to long(er) to run alongside, skirt (derivative of longlong1) + -eron noun suffix
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for longeron

  • Longeron—The term usually applied to any long spar running length-ways of a fuselage.

  • A large gap in one side of the fuselage, over a longeron that was charred to powder in parts, bore witness to the fire.

British Dictionary definitions for longeron

/ (ˈlɒndʒərən) /


a main longitudinal structural member of an aircraft

Word Origin for longeron

C20: from French: side support, ultimately from Latin longus long 1
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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