蟠尾丝虫 pánwěisīchóng onchocerca volvulus Origin Definitions Defs Strokes Stroke Words Sentences Sents 蟠尾丝虫症 pánwěisīchóngzhèng river blindness river blindness or onchocerciasis; an infectious disease caused by a parasitic worm and transmitted by blackflies, often resulting in severe skin itching and visual impairment