any of several birds of paradise of Australia, having a long bill, dark plumage, and elaborate courtship displays.
noun 1. a shoulder firearm with spiral grooves cut in the inner surface of the gun barrel to give the bullet a rotatory motion and thus a more precise trajectory. 2. one of the grooves. 3. a cannon with such grooves. 4. (often initial capital letter) rifles, any of certain military units or bodies equipped […]
noun 1. a shotgun projectile with helical grooves on its sides for imparting a spin to it when it is fired through the smooth bore of the shotgun.
noun, Architecture. 1. a rib that runs along the ridge of a vault. 2. a stone or piece of timber placed at the apex of the gable in a vault or a timber roof.