A person who sings or recites antiphons; a member of a church choir responsible for antiphonal singing.
From antiphon + -er (one who does). The -er suffix indicates the agent or person performing the action of antiphonal singing.
An antiphoner was a specialized choir member—sort of like being a backup singer, but with the responsibility of maintaining the church's liturgical integrity, making it both humble and crucial.
Complete word intelligence in one call. Free tier — 50 lookups/day.