n. any of a vast number of minute planets or planetary bodies. planetesimal hypothesis the theory that planets were formed by the accretion of planetesimals in a cold state.
[ PLANET, after infinitesimal ]
n. any of a vast number of minute planets or planetary bodies. planetesimal hypothesis the theory that planets were formed by the accretion of planetesimals in a cold state.
[ PLANET, after infinitesimal ]
Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012