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From what I was told by a Coptic theologian friend of mine a while ago, Pope Cyril the V (please correct me if I'm wrong) made a decision to give the Deacon's vestments to those of the minor orders (such as anagnostis and psaltis, which, as you say, had not yet emerged in Apostolic times) and that since then the term Deacon, while still properly referring to those ordained to the first of the three orders (which is how it is used in the other Orthodox churches), became used also to describe the minor orders
Can celibate men become deacons?
What is the role of non-married men and women in the church?
Are monks always ordained or are many lay?
Are monks always monastic or are some 'secular' (in society, working, eating with society, but still under vows).