蟠尾丝虫 pánwěisīchóng Onchocerca volvulus Origin Definitions Defs Strokes Stroke Words Sentences Sents 蟠尾丝虫症 pánwěisīchóngzhèng onchocerciasis river blindness or onchocerciasis, the second most common cause of blindness in humans, caused by the filarial parasite worm Onchocerca volvulus