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planetarium
noun plan·e·tar·i·um \ˌpla-nə-ˈter-ē-əm\
: a building or room in which images of stars, planets, etc., are shown on a high, curved ceiling
plural plan·e·tar·i·ums or plan·e·tar·ia\-ē-ə\
Full 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
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First Known Use of PLANETARIUM
1734
Rhymes with PLANETARIUM
PLANETARIA Defined for Kids
planetarium
noun plan·e·tar·i·um \ˌpla-nə-ˈter-ē-əm\
Definition of PLANETARIUM for Kids
: a building in which there is a device for projecting the images of heavenly bodies on a ceiling shaped like a dome
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