a sacristy in an Eastern or early Christian church, usually on the south side of the bema.
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How to use diaconicon in a sentence
It is covered either with a barrel or with a cross-groined vault, and communicates with the prothesis and the diaconicon.
Only the diaconicon now remains, covered by a cross-groined vault, and its apse pierced by a door leading to the hall of the Teké.
The prothesis and diaconicon have barrel vaults and apses with three sides projecting slightly on the exterior.
It has neither prothesis nor diaconicon of its own, but communicates with the original diaconicon of the main church.
The position of the prothesis and diaconicon in particular is identical in the two churches.