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onchocerciasis

on·cho·cer·ci·a·sis [ òngkō sur k əssiss ]


noun 
Definition:
 
disease caused by parasitic worms: a disease caused by infestation with worms, especially a tropical disease of humans caused by a parasitic worm and transmitted by blackflies, causing skin nodules, lesions, and blindness

[Early 20th century. < modern Latin Onchocerca, genus of worms < Greek ogkos "barb" + kerkos "tail," from their shape]
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