planetoid

Short definition from Wiktionary

Noun

1. 1
   An asteroid of any size
2. 2
   An asteroid-like body in an orbit beyond the asteroid belt, such as a centaur or Kuiper belt object
3. 3
   A larger, planetary, body in orbit around the Sun, such as Vesta or (candidate) dwarf planets such Eris or Sedna
4. 4
   Any planetary body, including classical planets and moons: a planetary-mass object
5. 5
   A dwarf planet