n. any of a vast number of minute planets or planetary bodies.
Phrases and idioms:
planetesimal hypothesis the theory that planets were formed by the accretion of planetesimals in a cold state.
Etymology: PLANET, after infinitesimal
n. any of a vast number of minute planets or planetary bodies.
Phrases and idioms:
planetesimal hypothesis the theory that planets were formed by the accretion of planetesimals in a cold state.
Etymology: PLANET, after infinitesimal
Oxford English vocab. Оксфордский английский словарь. 2012