Word.ws English Dictionary

planetesimal

planetesimal noun: any of many small, solid astronomical objects that orbit a star and form protoplanets through mutual gravitational attraction.

Noun

planetesimal (plural planetesimals)

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

Adjective

planetesimal (not comparable)

  1. Being or relating to one of these astronomical objects.
    • a planetesimal body

Forms of planetesimal

pluralplanetesimals

Origin of planetesimal

Formed from planet by analogy with infinitesimal.

Words formed from planetesimal

Questions about planetesimal

What does planetesimal mean?
Planetesimal means any of many small, solid astronomical objects that orbit a star and form protoplanets through mutual gravitational attraction.
What part of speech is planetesimal?
Planetesimal can be a noun or an adjective.
What is the plural of planetesimal?
The plural of planetesimal is planetesimals.

Words near planetesimal in the dictionary

  1. planetcide
  2. planetdom
  3. planeted
  4. planeteer
  5. planeteers
  6. planetesimal
  7. planetesimals
  8. planetessimal
  9. planetessimals
  10. planetfall
  11. planetful

Source and license

Adapted from Wiktionary: planetesimal (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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