planetoid

noun5

1. •
   (old-fashioned) An asteroid of any size

   • The group of small bodies that circle round the Sun, outside the orbit of Mars, are known under the designation of the planetoids. — 1856
2. •
   (old-fashioned) An asteroid-like body in an orbit beyond the asteroid belt, such as a centaur or Kuiper belt object
3. •
   A larger, planetary, body in orbit around the Sun, such as Vesta or (candidate) dwarf planets such Eris or Sedna

   • After discovering "planetoids", bodies orbiting the Sun, even larger than Pluto's moon Charon ... the question of how Sedna and other planetoids came to be. — 2009
4. •
   Any planetary body, including classical planets and moons: a planetary-mass object
5. •
   A dwarf planet

   • We prefer the word "planetoid" as a new word to describe round objects orbiting the sun. — 2006