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planetarium

plan·e·tar·ium

planetarium

 
pronunciation:
plae n teI ri m
features:
Word Combinations (noun), Word Explorer, Word Parts
part of speech: noun
inflections: planetaria, planetariums
definition 1: an apparatus that projects a representation of the stars, planets, and the like, usu. upon a dome-shaped ceiling.
definition 2: a museum, building, or room in which such an apparatus is located.
 
definition 3: a structure, such as a mechanical model, that represents the position or motion of objects in the solar system.
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  outer space, space
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