planetarium
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About Our Definitions: All forms of a word (noun, verb, etc.) are now displayed on one page.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
planetarium
noun (Concise Encyclopedia)Institution devoted to popular education in astronomy and related fields, especially space science, whose main teaching tool is a hemispheric screen onto which images of celestial objects as seen from Earth are projected from an instrument also known as a planetarium, or planetarium projector. Major planetariums have extensive exhibit space, museum collections, sizable staffs, projection domes 80 ft (25 m) or more across, and seating capacities of over 600.
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