onchocerciasis
noun
on·cho·cer·ci·a·sis
ˌäŋ-kō-ˌsər-ˈkī-ə-səs
ˌäŋ-kə-
plural onchocerciases
ˌäŋ-kō-ˌsər-ˈkī-ə-ˌsēz,
ˌäŋ-kə-
: infestation with or disease caused by filarial worms (genus Onchocerca)
especially
: a human disease marked by subcutaneous nodules, dermatitis, and visual impairment and caused by a worm (O. volvulus) found in Africa and tropical America which is transmitted by the bite of a female blackfly
called also river blindness
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Merriam-Webster unabridged
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