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planetarium

plan·e·tar·ium

planetarium

 
pronunciation:
plae n teI ri m
features:
Word Combinations (noun), Word Explorer, Word Parts
part of speech: noun
inflections: planetaria, planetariums
definition 1: a device that projects images of the sun, moon, stars, and planets on a ceiling that is shaped like a dome.
definition 2: a museum, building, or room in which such a device is located.
 
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  outer space, space
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