Found 2 items, similar to planetoid.
English → English (WordNet) Definition: planetoid 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]
English → English (gcide) Definition: Planetoid Planetoid \Plan"et*oid\, n. [Planet + -oid.] (Astron.) A body resembling a planet; an asteroid. [1913 Webster]