from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A major structural member of an aircraft fuselage, running from front to rear.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A thin strip of wood or metal, to which the skin of an aircraft is fastened.
French, from Old French, beam, from long, long, from Latin longus; see del-1 in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
Borrowing from French. (Wiktionary)