Search Result for "planetesimal hypothesis":
Wordnet 3.0

NOUN (1)

1. (cosmology) the theory that the solar system was formed by the gravitational accumulation of planetesimals; 



WordNet (r) 3.0 (2006):

planetesimal hypothesis
    n 1: (cosmology) the theory that the solar system was formed by
         the gravitational accumulation of planetesimals