speleology

Noun
  1. The scientific study of caves (synset 106131161)
    is a type of: geology - a science that deals with the history of the earth as recorded in rocks
    same as: spelaeology
  2. The pastime of exploring caves (synset 100799769)
    is a type of: avocation, by-line, hobby, pursuit, sideline, spare-time activity - an auxiliary activity
    same as: spelaeology

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