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planetaria's
1 dictionary results for: planetaria's
American Heritage Dictionary - Cite This Source - Share This
plan·e·tar·i·um     (plān'ĭ-târ'ē-əm)  Pronunciation Key 
n.   pl. plan·e·tar·i·ums or plan·e·tar·i·a (-ē-ə)
  1. An apparatus or model representing the solar system.
    1. An optical device for projecting images of celestial bodies and other astronomical phenomena onto the inner surface of a hemispherical dome.
    2. A building or room containing a planetarium, with seats for an audience.
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