smoothbore

1. A double-barreled smoothbore shoulder weapon for firing shot at short ranges.
   一种双管、无线膛、肩扛、近距离射击的武器。
2. These soldiers carry muzzle-loading, smoothbore muskets firing lead balls as wide as a man's thumb.
   这些士兵装备前装滑膛枪，所射出的铅弹如人的拇指一般粗。
3. And the Westerners have achieved mature technology in designing and producing smoothbore guns.
   西方军队主要使用的是燧发枪，滑膛枪的设计制造技术已经成熟。

noun

1. a firearm that has no rifling

adj

1. of a firearm

   Synonym:    unrifled