The Collaborative International Dictionary of English v.0.48:
Dossel \Dos"sel\, n. [See Dosel, n.] Same as Dorsal, n. [1913 Webster]WordNet (r) 3.0 (2006):
dossel n 1: an ornamental hanging of rich fabric hung behind the altar of a church or at the sides of a chancel [syn: dossal, dossel]