planetoid
noun
Forms planetoids
- noun (astronomy, dated) An asteroid of any size
- noun (astronomy, dated) An asteroid-like body in an orbit beyond the asteroid belt, such as a centaur or Kuiper belt object
- noun (astronomy) A larger, planetary, body in orbit around the Sun, such as Vesta or (candidate) dwarf planets such Eris or Sedna
- noun (astronomy) Any planetary body, including classical planets and moons: a planetary-mass object
- noun (astronomy) A dwarf planet
Synonyms
Etymology
Planet + -oid.
Webster’s 1913
- noun A body resembling a planet; an asteroid.
Sources: Wiktionary · WordNet 3.0 · Webster’s 1913 — from the Wiktionary entry “planetoid”, CC BY-SA 4.0. Details