1. Dutch astronomer who proved that the galaxy is rotating and proposed the existence of the Oort cloud (1900-1992); [syn: Oort, Jan Hendrix Oort]
WordNet (r) 3.0 (2006):
Jan Hendrix Oort
n 1: Dutch astronomer who proved that the galaxy is rotating and
proposed the existence of the Oort cloud (1900-1992) [syn:
Oort, Jan Hendrix Oort]