noun,plural Mith·rae·a [mi-three-uh], /mɪˈθri ə/, Mith·rae·ums.
a temple of Mithras.
1875–80; <New Latin <Greek Mithraîon, equivalent to Míthr(ās) Mithras + -aion suffix of place
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How to use Mithraeum in a sentence
A rock column supports the roof, and a building (possibly a Mithraeum) once stood above.