English Explanatory Dictionary

planetesimal

English dictionary entry

Meanings

noun
  1. Any of many small, solid astronomical objects that orbit a star and form protoplanets through mutual gravitational attraction.
adj
  1. Being or relating to one of these astronomical objects.

Word forms

planetesimal planetesimals

Etymology

Formed from planet by analogy with infinitesimal.

Related words

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

Derived words

exoplanetesimal preplanetesimal protoplanetesimal satellitesimal
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