diaconicon

[ dahy-uh-kon-i-kon, -kuh n ]

/ ˌdaɪ əˈkɒn ɪˌkɒn, -kən /

a sacristy in an Eastern or early Christian church, usually on the south side of the bema.

Origin of diaconicon

1720–30; < Late Greek diākonikón (> Late Latin diāconicum), neuter of diākonikós of a deacon; see -ic

The prothesis and the diaconicon are represented by chapels to north and south of the apse.

Byzantine Churches in Constantinople |Alexander Van Millingen
The two smaller compartments and apses at the sides of the bema were sacristies, the diaconicon and prothesis.

Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 |Various
The position of the prothesis and diaconicon in particular is identical in the two churches.

Byzantine Churches in Constantinople |Alexander Van Millingen
It is covered either with a barrel or with a cross-groined vault, and communicates with the prothesis and the diaconicon.

Byzantine Churches in Constantinople |Alexander Van Millingen

It has neither prothesis nor diaconicon of its own, but communicates with the original diaconicon of the main church.

Byzantine Churches in Constantinople |Alexander Van Millingen