We found one dictionary that defines the word gelotological:

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1. gelotological: Wiktionary

Definitions from Wiktionary (gelotological) ▸ adjective:  Of or relating to gelotology. ▸ Words similar to gelotological ▸ Usage examples for gelotological ▸ Idioms related to gelotological ▸ Wikipedia articles (New!) ▸ Popular nouns described by gelotological ▸ Words that often appear near gelotological ▸ Rhymes of gelotological ▸ Invented words related to gelotological