The Collaborative International Dictionary
Fermeture
Fermeture \Fer"me*ture\, n. [F., fr. fermer to close.] (Mil.) The mechanism for closing the breech of a breech-loading firearm, in artillery consisting principally of the breechblock, obturator, and carrier ring.
Wiktionary
fermeture
n. The mechanism for closing the breech of a breech-loading firearm, in artillery consisting principally of the breechblock, obturator, and carrier ring.