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Definition of Planetarium
1. Noun. A building housing an instrument for projecting the positions of the planets onto a domed ceiling.
2. Noun. An optical device for projecting images of celestial bodies and other astronomical phenomena onto the inner surface of a hemispherical dome.
Generic synonyms: Optical Device
3. Noun. An apparatus or model for representing the solar systems.
Definition of Planetarium
1. n. An orrery. See Orrery.
Definition of Planetarium
1. Noun. A display museum in which images of stars and other astronomical phenomena are projected onto a domed ceiling. ¹
2. Noun. An orrery. ¹
¹ Source: wiktionary.com
Definition of Planetarium
1. [n -RIA or -RIUMS]