sedilia

plural noun

se·​di·​lia sə-ˈdēl-yə 

-ˈdil-,

 especially British  -ˈdī(-ə)l-

: seats on the south side of the chancel for the celebrant and his assistants

Word History

Etymology

Latin, plural of sedile seat, from sedēre

First Known Use

1793, in the meaning defined above