Source : Webster's Revised Unabridged Dictionary (1913)

Cosmogonal \Cos*mog"o*nal\ (k?z-m?g"?-nal), Cosmogonic
\Cos`mo*gon"ic\ (k?z`m?-g?n"?k), Cosmogonical \Cos`mo*gon"ic*al\
   (-g?n"?-kal), a.
   Belonging to cosmogony. --B. Powell. Gladstone.