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

palaeontologist

noun (especially British English) (North American English usually paleo-)
ˌpæliɒnˈtɒlədʒɪst
 
; ˌpeɪliɒnˈtɒlədʒɪst
 
; ˌpeɪliɑːnˈtɑːlədʒɪst
 
 
a person who studies fossils