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asteroid definition

as·ter·oid (as′tər o̵id′)

adjective

starlike; shaped like a star or starfish

Etymology: Gr asteroeidēs < astēr, star + eidēs, -oid

noun

  1. any of the thousands of small planets ranging from 1,000 km (621 mi) to less than one km (0.62 mi) in diameter, with orbits usually between those of Mars and Jupiter; minor planet; planetoid
  2. Zool. starfish

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