[ lon-jer-uh n ]
/ ˈlɒn dʒər ən /

noun Aeronautics.

a main longitudinal brace or support on an airplane.

Origin of longeron

1910–15; < French: side-piece, equivalent to long(er) to run alongside, skirt (derivative of long long1) + -eron noun suffix
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples 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

Word Origin and History for longeron



1912, from French longeron, from longer "to skirt, extend along," from allonger "to lengthen" (see lunge).

Online Etymology Dictionary, © 2010 Douglas Harper