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atmospherium

[at-muh s-feer-ee-uh m] /ˌæt məsˈfɪər i əm/
noun, plural atmospheria [at-muh s-feer-ee-uh] /ˌæt məsˈfɪər i ə/ (Show IPA)
1.
an optical system used to simulate images of atmospheric phenomena, as cloud formations, storms, and day and night, on the inside of a dome.
2.
a building in which this projection system is used.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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