The Collaborative International Dictionary
Apopemptic
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.
Wiktionary
apopemptic
a. Pertaining to departing; farewell, valedictory. n. (label en obsolete) A farewell or parting address.
WordNet
apopemptic
adj. addressed to one who is departing; "apopemptic hymns"