Source : Webster's Revised Unabridged Dictionary (1913)

Apopemptic \Ap`o*pemp"tic\, a. [Gr. ?, fr. ? to send off or
   away; ? from + ? to send.]
   Sung or addressed to one departing; valedictory; as,
   apoplectic songs or hymns.

Source : WordNet®

apopemptic
     adj : addressed to one who is departing; "apopemptic hymns"