Webster’s Revised Unabridged Dictionary · 1913
Asteroid
As′ter·oid, n. [Gr. ἀστεροειδής 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.