a. 无神论的, 无神论者的

Atheistic \A`the*is"tic\, Atheistical \A`the*is"tic*al\, a.
1. Pertaining to, implying, or containing, atheism; --
applied to things; as, atheistic doctrines, opinions, or
books.

Atheistical explications of natural effects.
--Barrow.

2. 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.