The Collaborative International Dictionary of English v.0.48:

Paschal \Pas"chal\ (p[a^]s"kal), a. [L. paschalis: cf. F.
   pascal. See Pasch.]
   Of or pertaining to the passover, or to Easter; as, a paschal
   lamb; paschal eggs. --Longfellow.
   [1913 Webster]

   Paschal candle (R. C. Ch.), a large wax candle, blessed and
      placed on the altar on Holy Saturday, or the day before
      Easter.

   Paschal flower. See Pasque flower, under Pasque.
      [1913 Webster]

WordNet (r) 3.0 (2006):

paschal
    adj 1: of or relating to Passover or Easter; "paschal lamb"