Link Centre Dictionary

planetesimal

pla·ne·te·simal

uncommon

noun

1.

one of many small solid celestial bodies thought to have existed at an early stage in the development of the solar system

Origin

Formed from planet by analogy with infinitesimal.

Related words

Word family

Broader terms

WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.