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planetesimal

Syllabification: (plan·e·tes·i·mal)
Pronunciation: /ˌplaniˈtesəməl/
Astronomy
Definition of planetesimal

noun

  • a minute planet; a body that could or did come together with many others under gravitation to form a planet.

adjective

[attributive]
  • relating to planetesimal bodies.

Origin:

early 20th century: from planet, on the pattern of infinitesimal

planetesimal in other Oxford dictionaries

Definition of planetesimal in the British & World English dictionary

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