Hypertext Webster Gateway: "planetoids"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Asteroid \As"ter*oid\, n. [Gr. ? starlike, starry; 'asth`r star
+ ? form: cf. F. ast['e]ro["i]de. See {Aster}.]
A starlike body; esp. one of the numerous small planets whose
orbits lie between those of Mars and Jupiter; -- called also
{planetoids} and {minor planets}.
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