From Ancient Greek χθών (khthōn, “ground”) + νόσος (nosos, “disease”) + λογία (logia, “discourse, branch of knowledge”).
"chthononosology." YourDictionary, n.d. Web. 22 June 2018. <http://www.yourdictionary.com/chthononosology>.
chthononosology. (n.d.). Retrieved June 22nd, 2018, from http://www.yourdictionary.com/chthononosology
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