Of or relating to cosmogony; describing accounts or theories about the origin of the universe and world.
From cosmogonic + -al, doubling the typical adjective suffixes (-ic and -al). This variant form is less common than cosmogonic but appears in formal scientific and philosophical writing.
The existence of both 'cosmogonic' and 'cosmogonical' shows how English loves redundancy—we do this with 'historic' vs. 'historical' and 'geographic' vs. 'geographical,' often using the longer form for extra formality.
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