planetoid

  1. Noun.  (astronomy) An asteroid of any size.
  2. Noun.  (astronomy) An asteroid-like body in an orbit beyond the asteroid belt, such as a Centaur or Kuiper belt object.
  3. Noun.  (astronomy) A larger, planetary, body in orbit around the Sun, such as Vesta or (candidate) dwarf planets such Eris or Sedna.
  4. Noun.  (astronomy) A dwarf planet.

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This entry was last updated on RefTopia from its source on 3/20/2012.