Plān'et-oid, n.
n. [Gr. πλανήτης, planet, and εἶδος, form.] (Astron.) A body resembling a planet; especially, one of the numerous groups of small planets whose orbits lie between those of Mars and Jupiter; an asteroid.
n. [Gr. πλανήτης, planet, and εἶδος, form.] (Astron.) A body resembling a planet; especially, one of the numerous groups of small planets whose orbits lie between those of Mars and Jupiter; an asteroid.