The Collaborative International Dictionary
Deistical
Deistic \De*is"tic\ (d[-e]*[i^]s"t[i^]k), Deistical \De*is"tic*al\, a. Pertaining to, savoring of, or consisting in, deism; as, a deistic writer; a deistical book.
The deistical or antichristian scheme.
--I. Watts.
Wiktionary
deistical
a. Of or relating to deism.