projectile

A projectile is an object that's thrown or propelled through the air.

You've probably seen projectiles flying around when you watch fireworks or play with toys like water balloons. But the word "projectile" isn't limited to fun and games. In science, it refers to anything that moves through space under its own power – like a speeding bullet or a rocket ship blasting off into orbit. The term is also used in sports, where athletes are considered projectiles when they jump high or run fast. Even everyday objects can be projectiles if they're thrown or launched at high speeds, such as a rock skipping across water or a baseball flying through the air.