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1. Pertaining to the branch of astronomy dealing with the origin and history and structure and dynamics of the universe
   "cosmological redshift"
   - cosmologic, cosmogonic, cosmogonical, cosmogenic
    
2. Pertaining to the branch of philosophy dealing with the elements and laws and especially the characteristics of the universe such as space and time and causality
   "a cosmological argument is an argument that the universe demands the admission of an adequate external cause which is God"
   - cosmologic

See also: cosmology

Encyclopedia: Cosmological