planetoid

n. 小行星, 类行星的物体

发音

US

词形变化

planetoids 复数 planetoids

释义与例句

n.
  1. 1.

    An asteroid of any size

    过时 天文
  2. 2.

    An asteroid-like body in an orbit beyond the asteroid belt, such as a centaur or Kuiper belt object

    过时 天文
  3. 3.

    A larger, planetary, body in orbit around the Sun, such as Vesta or (candidate) dwarf planets such Eris or Sedna

    天文
  4. 4.

    Any planetary body, including classical planets and moons: a planetary-mass object

    小行星

    天文
  5. 5.

    A dwarf planet

    天文

词汇关系

词源

From planet + -oid.

来源:wiktionary