paleontology
noun [ U ] science US specialized (also mainly UK palaeontology) uk/ˌpæl.i.ənˈtɒl.ə.dʒi/ us/ˌpæl.i.ənˈtɑː.lə.dʒi/
古生物学
the study of fossils as a way of getting information about the history of life on earth and the structure of rocks