Definition of cosmologist noun from the Oxford Advanced Learner's Dictionary

 

cosmologist

 noun
noun
BrE BrE//kɒzˈmɒlədʒɪst//
 
; NAmE NAmE//kɑːzˈmɑːlədʒɪst//
 
 
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a scientist who studies the universe and its origin and development (= cosmology)