GNU Collaborative International Dictionary of English

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1.       
   Asteroid , n. [Gr.  starlike, starry; ἀστήρ star + εἶδος form: cf. F. astéroïde. 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.
   1913 Webster