What is a sand grain to boulder sized rocky body that travels through space?

A sand grain to boulder-sized rocky body that travels through space is typically referred to as a "meteoroid." Meteoroids can vary significantly in size, ranging from tiny particles to larger objects, and they originate from asteroids, comets, or other celestial bodies. When they enter a planet's atmosphere and produce a visible streak of light, they are known as meteors, and if they survive their passage to land on the surface, they are called meteorites.