cosmology /kɑzˈmɑːləʤi/ noun Learner's definition of COSMOLOGY
[noncount]
: the scientific study of the origin and structure of the universe宇宙学；宇宙论
— cosmological
/ˌkɑːzməˈlɑːʤɪkəl/ adjective — cosmologist
/kɑzˈmɑːləʤɪst/ noun, plural cosmologists [count]