Planetoid

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Planetoid \Plan"et*oid\, n. [Planet + -oid.] (Astron.)
     A body resembling a planet; an asteroid.
     [1913 Webster]

From WordNet (r) 2.0 [wn]:



  planetoid
       n : any of numerous small celestial bodies composed of rock and
           metal that move around the sun (mainly between the orbits
           of Mars and Jupiter) [syn: {asteroid}, {minor planet}]