Speleology Definition
 spēlē-ŏlə-jē 
    noun
  
 The scientific study and exploration of caves.
 Webster's New World 
Exploration of caves.
 American Heritage 
Synonyms: 
  - spelaeology
 
Origin of Speleology
French spéléologie Latin spēlaeum, spēlēum cave (from Greek spēlaion) -logie -logy
From American Heritage Dictionary of the English Language, 5th Edition
From speleo- +"Ž -logy.
From Wiktionary
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