Wiktionary
stiffeners
n. (plural of stiffener English)
Usage examples of "stiffeners".
Those convergent ribs are no doubt the stiffeners with which the sails are controlled.
However, to my knowledge, the stiffeners and bracing that supported them also buttressed other important structures on the ships, and had been carried through each successive model to the most modern MK V-B marks, although no frontline Starfuries had carried HyperTorps anywhere for nearly two years.