Acroteleutic

Ac`ro`te`leu´tic

    (ăk`rô`tė`lū´tĭk)
n.1.(Eccles.) The end of a verse or psalm, or something added thereto, to be sung by the people, by way of a response.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.