at·​mo·​sphe·​ri·​um | \ ˌatməˈsfirēəm \
plural -s

Definition of atmospherium

1 : an optical device for projecting images of meteorological phenomena (such as clouds) on the inside of a dome
2 : a room housing an atmospherium

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First Known Use of atmospherium

1960, in the meaning defined at sense 1

History and Etymology for atmospherium

blend of atmosphere and planetarium

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The first known use of atmospherium was in 1960

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Cite this Entry

“Atmospherium.” Dictionary, Merriam-Webster, Accessed 29 Nov. 2020.

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