n. A display museum in which images of stars and other astronomical phenomena are projected onto a domed ceiling.
n. An orrery.
the GNU version of the Collaborative International Dictionary of English
n. An orrery. See orrery.
The Century Dictionary and Cyclopedia
n. An astronomical machine which, by the movement of its parts, represents the motions and orbits of the planets. See orrery.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. an apparatus or model for representing the solar systems
n. an optical device for projecting images of celestial bodies and other astronomical phenomena onto the inner surface of a hemispherical dome
n. a building housing an instrument for projecting the positions of the planets onto a domed ceiling
Word Usage
"So you wonder who actually wrote that bit, when a planetarium is an excellent example of exciting science education for students, yet it's dismissed so casually more than once."