English-Finnish translations for diptych

A writing tablet consisting of two leaves of rigid material connected by hinges and shutting together so as to protect the writing within
A double catalogue, containing in one part the names of living, and in the other of deceased, ecclesiastics and benefactors of the church
Artistically-wrought tablets distributed by consuls, etc. of the later Roman Empire to commemorate their tenure of office; hence transferred to a list of magistrates

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