In aircraft construction, a longeron, or stringer or stiffener, is a thin strip of material to which the skin of the aircraft is fastened. In the fuselage, stringers are attached to formers (also called frames) and run in the longitudinal direction of the aircraft. They are primarily responsible for transferring the aerodynamic loads acting on the... Found on http://en.wikipedia.org/wiki/Longeron
A principal longitudinal member of a fuselage's framing, usually continuous across a number of supporting points. Found on http://www.aerofiles.com/glossary.html
A principal longitudinal member of a fuselage's framing, usually continuous across a number of supporting points. Found on https://www.encyclo.co.uk/local/22323