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

 

speleologist

 noun
noun
BrE BrE//ˌspiːliˈɒlədʒɪst//
 
; NAmE NAmE//ˌspiːliˈɑːlədʒɪst//
 
 
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a scientist who studies caves or a person who goes into caves as a sport compare caver, potholer (1), spelunker (1) Word Origin late 19th cent.: from French spéléologie, via Latin from Greek spēlaion ‘cave’ + -ist.
See the Oxford Advanced American Dictionary entry: speleologist