The Collaborative International Dictionary of English v.0.48:

Sacerdotal \Sac`er*do"tal\, a. [L. sacerdotalis, fr. sacerdos,
   -otis, a priest, fr. sacer holy, sacred: cf. F. sacerdotal.]
   Of or pertaining to priests, or to the order of priests;
   relating to the priesthood; priesty; as, sacerdotal dignity;
   sacerdotal functions.
   [1913 Webster]

         The ascendency of the sacerdotal order was long the
         ascendency which naturally and properly belongs to
         intellectual superiority.                --Macaulay.
   [1913 Webster]

WordNet (r) 3.0 (2006):

sacerdotal
    adj 1: of or relating to a belief in sacerdotalism; "sacerdotal
           emphasis on the authority of priests"
    2: associated with the priesthood or priests; "priestly (or
       sacerdotal) vestments"; "hieratic gestures" [syn: priestly,
       hieratic, hieratical, sacerdotal]

Moby Thesaurus II by Grady Ward, 1.0:

37 Moby Thesaurus words for "sacerdotal":
   abbatial, abbatical, apostolic, archiepiscopal, canonical,
   capitular, capitulary, ceremonial, ceremonious, churchly, clerical,
   conventional, decorous, ecclesiastic, ecclesiastical, episcopal,
   episcopalian, evangelistic, hieratic, liturgic, ministerial, papal,
   pastoral, pompous, prelatial, prelatic, priest-ridden, priestish,
   priestly, rabbinic, religious, ritual, ritualistic, solemn,
   stately, ultramontane, well-mannered