asteroid

名词 n.
中文释义
发音 ăs'tə-roid"

英文释义

名词 n.
  1. A naturally occurring solid object, which is smaller than a planet and a dwarf planet, larger than a meteoroid and not a comet, that orbits a star and often has an irregular shape.
  2. Any member of the taxonomic class Asteroidea; a starfish.
  3. In the Solar System, such a body that orbits within the orbit of Jupiter.
    — The orbital planes of asteroids, minor bodies that circle the Sun mainly between the orbits of Mars and Jupiter, are often more tilted ...

词形变化

asteroids plural asteroids plural

词汇关系

衍生词
Apohele asteroid asterite asteroidal asteroid belt asteroidlike Aten asteroid Atira asteroid binary asteroid disasteroid icesteroid iceteroid interasteroid kuiperoid Vatira asteroid ꞌAylóꞌchaxnim asteroid
相关词
aster asterisk asterism minor planet astroid comet exoasteroid meteor meteorite planetoid

词源

词源 1
]Introuced by German–British astronomer William Herschel in 1802 upon the suggestion of classical scholar Charles Burney Jr. (1757–1817), the son of music historian Charles Burney, a friend of Herschel's. Probably coined as a learned borrowing from Ancient Greek ἀστεροειδής (asteroeidḗs, “starlike”), from ἀστήρ (astḗr, “celestial body”) + -ειδής (-eidḗs, adjective-forming suffix). By surface analysis, aster + -oid.
词源 2
Borrowed from Ancient Greek ἀστεροειδής (asteroeidḗs), from ἀστήρ (astḗr, “star”) + εἶδος (eîdos, “form”). Analyzable as aster- + -oid. Piecewise doublet of etymology 1. Compare also the botanical taxon Asteroideae.
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