planetarium

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planetarium /ˌplænəˈterijəm/ noun
plural planetariums or planetaria /-ijə/ /ˌplænəˈterijə/
planetarium
/ˌplænəˈterijəm/
noun
plural planetariums or planetaria /-ijə/ /ˌplænəˈterijə/
Learner's definition of PLANETARIUM
[count]
: a building or room in which images of stars, planets, etc., are shown on a high, curved ceiling
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