The Collaborative International Dictionary
Atheistic \A`the*is"tic\, Atheistical \A`the*is"tic*al\, a.
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Pertaining to, implying, or containing, atheism; -- applied to things; as, atheistic doctrines, opinions, or books.
Atheistical explications of natural effects.
--Barrow. Disbelieving the existence of a God; impious; godless; -- applied to persons; as, an atheistic writer. -- A`the*is"tic*al*ly, adv. -- A`the*is"tic*al*ness, n.
Wiktionary
a. Of or relating to atheism.
WordNet
adj. related to or characterized by or given to atheism; "atheist leanings" [syn: atheist, atheistic]
rejecting any belief in gods [syn: atheistic, unbelieving]
Usage examples of "atheistical".
I believe the landlady put it all down to my atheistical views a just retribution for harboring such a notorious fellow in her house!
The atheistical works of Robert Ingersoll were not purchased by the rank and file of the Republican Party for purposes of party propaganda, but the rank and file of the Revolutionary Party spend large sums of money on publications in which their avowed leaders teach atheism as part of the Socialist program.
While some intelligences can recognize the same God under a variety of names and symbols without any severe strain, others cannot even detect the most contrasted Gods one from the other provided they wear the same mask and title It appears a perfectly natural and reasonable thing to many minds to restate religion now in terms of biological and psychological necessity, while to others any variation whatever in the phrasing of the faith seems to be nothing less than atheistical misrepresentations of the most damnable kind.