planetarium meaning

planetarium as a noun

1. a building housing an instrument for projecting the positions of the planets onto a domed ceiling

   Type of: building

2. an optical device for projecting images of celestial bodies and other astronomical phenomena onto the inner surface of a hemispherical dome

   Type of: optical device

3. an apparatus or model for representing the solar systems

   Type of: model

   Kinds: orrery

How to pronounce planetarium

planetarium is pronounced /ˌplænəˈtɛriəm/ in American English. It has 5 syllables, with the stress on the third syllable.

Words that rhyme with planetarium

• barium
• aquarium
• herbarium
• honorarium