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3 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 plan·e·tar·i·um /ˌplænəˈtɛriəm/
 行星儀,天文

From: Webster's Revised Unabridged Dictionary (1913)

 Plan·e·ta·ri·um n.  An orrery. See Orrery.
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From: WordNet (r) 2.0

 planetarium
      n 1: a building housing an instrument for projecting the
           positions of the planets onto a domed ceiling
      2: an optical device for projecting images of celestial bodies
         and other astronomical phenomena onto the inner surface of
         a hemispherical dome
      3: an apparatus or model for representing the solar systems
      [also: planetaria (pl)]