asteroid
/ˈæstərɔɪd/noun
- a small rocky body orbiting the sun. Large numbers of these, ranging enormously in size, are found between the orbits of Mars and Jupiter, though some have more eccentric orbits.小行星。
派生词
asteroidal
adjective词源
early 19th cent.: from Greek asteroeidēs 'starlike'， from astēr 'star'.