planetarium
plan·e·tar·i·um
noun \ˌpla-nə-ˈter-ē-əm\ plural plan·e·tar·i·ums or plan·e·tar·ia\-ē-ə\
Definition of PLANETARIUM
1
: a model or representation of the solar system
2
a : an optical device for projecting various celestial images and effects b : a building or room housing such a projector
See First Known Use of PLANETARIUM
1734
Rhymes with PLANETARIUM
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