noun
smooth-bore gun; unrifled gun
A firearm whose barrel has no rifling; used in historical and technical contexts.
滑腔砲はライフル砲に比べて命中精度が低い。
Smooth-bore guns have lower accuracy compared to rifled guns.
A rifled gun, which has spiral grooves inside the barrel to improve accuracy, unlike a smooth-bore gun.
Compound of 滑 (smooth) + 腔 (cavity) + 砲 (cannon/gun), describing a firearm with a smooth bore.