Source : Webster's Revised Unabridged Dictionary (1913)

Liturgic \Li*tur"gic\, Liturgical \Li*tur"gic*al\, [Gr. ?: cf.
   F. liturgique.]
   Pertaining to, of or the nature of, a liturgy; of or
   pertaining to public prayer and worship. --T. Warton.

Source : WordNet®

liturgical
     adj : of or relating to or in accord with liturgy