Word Type

Noun

Adjective

The word "planetesimal" can be used as noun and adjective.

Word Relationships

Derived Terms

exoplanetesimal preplanetesimal protoplanetesimal satellitesimal

Etymologically Related To

infinitesimal planet

Context

astronomy

Broader Terms (Hypernyms)

celestial body heavenly body

Type Of (IsA)

celestial body

Related Terms

asteroid dwarf planet major planet mesoplanet minor planet planemo planet planetoid protoplanet superplanet

Related Terms

asteroid astronomical attraction dwarf planet gravitational major planet mesoplanet minor planet planemo planet planetoid protoplanet star superplanet

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.