planetoid
名词 n.
英文释义
名词 n.
-
An asteroid of any size
— The group of small bodies that circle round the Sun, outside the orbit of Mars, are known under the designation of the planetoids.
- An asteroid-like body in an orbit beyond the asteroid belt, such as a centaur or Kuiper belt object
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A larger, planetary, body in orbit around the Sun, such as Vesta or (candidate) dwarf planets such Eris or Sedna
— After discovering "planetoids", bodies orbiting the Sun, even larger than Pluto's moon Charon ... the question of how Sedna and other planetoids came to be.
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Any planetary body, including classical planets and moons: a planetary-mass object
— Plate tectonics is a style of convection for an active planetoid where lid fragment (plate) motions reflect sinking of dense lithosphere in subduction zones […] In 2015 humanity completed a 50+ year effort to survey the 30 largest planets, asteroids, satellites, and inner Kuiper Belt objects, which we informally call “planetoids”.
-
A dwarf planet
— We prefer the word "planetoid" as a new word to describe round objects orbiting the sun.
词形变化
词汇关系
词源
Etymology tree
English planet
Ancient Greek -ο- (-o-)der.
Latin -o-
Proto-Indo-European *weyd-
Proto-Indo-European *-os
Proto-Indo-European *wéydos
Proto-Hellenic *wéidos
Ancient Greek εἶδος (eîdos)
Proto-Indo-European *-os
Proto-Indo-European *-ēs
Ancient Greek -ης (-ēs)
Ancient Greek -ειδής (-eidḗs)
Latin -oīdēslbor.
English -oid
English planetoid
From planet + -oid.
English planet
Ancient Greek -ο- (-o-)der.
Latin -o-
Proto-Indo-European *weyd-
Proto-Indo-European *-os
Proto-Indo-European *wéydos
Proto-Hellenic *wéidos
Ancient Greek εἶδος (eîdos)
Proto-Indo-European *-os
Proto-Indo-European *-ēs
Ancient Greek -ης (-ēs)
Ancient Greek -ειδής (-eidḗs)
Latin -oīdēslbor.
English -oid
English planetoid
From planet + -oid.
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数据来源: Wiktionary