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plan·e·tar·ium
 planetarium
- pronunciation:
- plae
n
teI
ri
m
- features:
- Word Explorer
| 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.
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| definition 2: |
a museum, building, or room in which such an apparatus is located.
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| 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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