noun
tracer bullet; star shell; flare bomb
Military term for a projectile that leaves a visible trail or illuminates an area. Covers tracer ammunition, illuminating shells, and flare bombs.
曳光弾が夜空に弧を描いた。
A tracer bullet drew an arc across the night sky.
戦場では、曳光弾が目標
On the battlefield, tracer rounds are used to indicate the target's position.