Webster's English Dictionary

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asteroid

1. as.ter.oid \'as-t*-.ro.id\ n [Gk asteroeide-s starlike, fr. aster-, 
   aste-r] 1: one of thousands of small planets between Mars and Jupiter with 
   diameter s from a fraction of a mile to nearly 500 miles 2: STARFISH 
2. asteroid aj 1: resembling a star  2: of or resembling a starfish