Meteor dust refers to the particles that are left behind by a meteor as it disintegrates in the Earth's atmosphere. There are many synonyms for this term, including cosmic dust, space dust, interstellar dust, and meteorite dust. These terms all refer to the same phenomenon of tiny particles of dust that are created as meteors collide with the Earth's atmosphere. Other terms that are sometimes used include meteoritic dust, micrometeoroids, and extraterrestrial dust. Regardless of the term used, meteor dust is an interesting and important area of study for scientists, as it provides insight into the origins of our solar system and the universe as a whole.