Definitions
1.nounA chief legal clerk or notary in Roman Byzantium, and (hence) in Rome.
2.nounOne of the seven prelates, constituting a college in the Roman Curia, whose office is to register pontifical acts and to make and preserve the official record of beatifications.
3.nounA registrar or chief clerk in various courts of law, especially (US) in a county court, (Australia) in certain state Supreme Courts.
4.noun(Greek Orthodox Church) The chief secretary of the patriarch of Constantinople.