firearm

名词 firearm:

1. a portable gun
   同义词：piece, small-arm

1. A small metal knob on the muzzle of a firearm, such as a rifle, used for sighting.
   准星枪炮口上，瞄准用的小圆金属突起，如来福枪上的准星
2. A usually metal projectile in the shape of a pointed cylinder or a ball that is expelled from a firearm, especially a rifle or a handgun.
   子弹，枪弹从火器中，尤指步枪或手枪中发射出来的金属射弹，形状为尖柱体或球状
3. A cap or tube containing a small amount of explosive used to detonate the main explosive charge of a firearm or mine.
   雷管，底火，导火线装有少量爆炸物的帽或管，用来引爆枪炮或地雷、水雷等
4. A device for igniting the charge of a firearm.
   枪机一种用来点燃火器中火药的装置