Definition of planetarium noun from the Oxford Advanced Learner's Dictionary

 

planetarium

 noun
noun
BrE BrE//ˌplænɪˈteəriəm//
 
; NAmE NAmE//ˌplænɪˈteriəm//
 
(pl. planetariums) Buildings, The universe
 
jump to other results
a building with a curved ceiling to represent the sky at night, with moving images of the planets and stars, used to educate and entertain people See related entries: Buildings, The universe Word Origin mid 18th cent.: modern Latin, from Latin planetarius ‘relating to the planets’.
See the Oxford Advanced American Dictionary entry: planetarium