- a temple of Mithras.
Origin of Mithraeum
1875–80; < New Latin < Greek Mithraîon, equivalent to Míthr(ās) Mithras + -aion suffix of place
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for mithraeum
A rock column supports the roof, and a building (possibly a Mithraeum) once stood above.