arcosolium
noun
ar·co·so·li·um
\ˌärkəˈsōlēəm\
Definition of arcosolium
arcosolia
\-lēə\: an arched cell in a Roman catacomb; especially : one designed to receive a sarcophagus
From the M-W Editors
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Origin and Etymology of arcosolium
New Latin, from arco- (from Latin arcus bow) + Latin solium seat, sarcophagus, from sedēre to sit
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