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.
noun, plural riflemen. 1. a soldier armed with a rifle. 2. a person skilled in the use of a rifle. noun (pl) -men 1. a person skilled in the use of a rifle, esp a soldier 2. Also called titipounamu. a wren, Acanthisitta chloris, of New Zealand: family Xenicidae See also bush wren
noun 1. a pit or short trench affording shelter to riflemen in firing at an enemy.