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speleology▼◼◼◼(scientific study of caves)noun[UK: ˌspiː.lɪ.ˈɒ.lə.dʒi] [US: ˌspiː.lɪ.ˈɒ.lə.dʒi]
spelunking▼◼◼◻(exploring underground caverns)noun[UK: spˈelʌŋkɪŋ] [US: spˈelʌŋkɪŋ]
biospeleology▼◼◼◼noun
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