spe ‧ le ‧ ol ‧ o ‧ gy /ˌspiːliˈɒlədʒi $ -ˈɑːl-/ BrE AmE noun [uncountable] technical
1 . British English the sport of walking and climbing in ↑ cave s SYN spelunking American English
2 . the scientific study of ↑ cave s
—speleologist noun [countable]