strongyloidiasis Syllabification: (stron·gy·loi·di·a·sis)Pronunciation: /ˌstränjəloiˈdīəsis/Definition of strongyloidiasis noun infestation with threadworms of a type found in tropical and subtropical regions, chiefly affecting the small intestine and causing ulceration and diarrhea. The worms belong to the genus Strongyloides, class Phasmida, in particular S. stercoralis strongyloidiasis in other Oxford dictionaries Definition of strongyloidiasis in the British & World English dictionary