The Collaborative International Dictionary of English v.0.48:
Baptistic \Bap*tis"tic\, a. [Gr. baptistiko`s.] Of or for baptism; baptismal. [1913 Webster]WordNet (r) 3.0 (2006):
Baptistic adj 1: of or pertaining to or characteristic of the Baptist church; "Baptistis baptismal practices"