i Register
In some senses, subdeacon is marked as historical. Watch for register when choosing this word.
noun
A Catholic clerical rank in the major orders below that of a deacon.
A Catholic cleric who assists the deacon at High Mass and normally reads the Epistle at the Eucharist.
A layperson who acts as an assistant to the deacon during the celebration of mass.
The highest of the minor orders below that of a deacon.