sedilia

noun, plural se·dil·i·a [se-dil-ee-uh] /sɛˈdɪl i ə/. Ecclesiastical.

1. one of the seats (usually three) on the south side of the chancel, often recessed, for the use of the officiating clergy.

noun

1. (functioning as singular) the group of three seats, each called a sedile (sɛˈdaɪlɪ), often recessed, on the south side of a sanctuary where the celebrant and ministers sit at certain points during High Mass