曳えい痕こん弾だん

noun

tracer bullet; tracer shell

Military term for ammunition that leaves a visible trail, used for aiming or signaling.

• 曳えい痕こん弾だんは夜や間かん射しゃ撃げきで弾だん道どうを示しめすために使つかわれる。

  Tracer bullets are used to show the trajectory during night shooting.