planetesimal

n. 星子, 小行星体

词形变化

planetesimals 复数 planetesimals

别名

planetessimal

释义与例句

n.
  1. 1.

    Any of many small, solid astronomical objects that orbit a star and form protoplanets through mutual gravitational attraction.

    天文
adj.
  1. 1.

    Being or relating to one of these astronomical objects.

    天文

    a planetesimal body

词汇关系

名词

上位词 2

celestial body heavenly body

词源

Formed from planet by analogy with infinitesimal.

来源：wiktionary