The Collaborative International Dictionary of English v.0.48:
Apopemptic \Ap`o*pemp"tic\ (-p[e^]mp"t[i^]k), a. [Gr. 'apopemptiko`s, fr. 'apope`mpein to send off or away; 'apo` from + pe`mpein to send.] Sung or addressed to one departing; valedictory; as, apopemptic songs or hymns. [1913 Webster]WordNet (r) 3.0 (2006):
apopemptic adj 1: addressed to one who is departing; "apopemptic hymns"