Search Result for "planetarium": 
Wordnet 3.0

NOUN (3)

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;


The Collaborative International Dictionary of English v.0.48:

Planetarium \Plan`e*ta"ri*um\, n. [NL.: cf. F. plan['e]taire. See Planetary.] An orrery. See Orrery. [1913 Webster]
WordNet (r) 3.0 (2006):

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
Moby Thesaurus II by Grady Ward, 1.0:

22 Moby Thesaurus words for "planetarium": Cassegrainian telescope, Newtonian telescope, OAO, OSO, astronomical observatory, astronomical telescope, coelostat, coronagraph, coronograph, heliostat, observatory, orrery, radar telescope, radio observatory, radio telescope, reflector, refractor, spectrograph, spectroheliograph, spectrohelioscope, spectroscope, telescope