Main Entry: on·cho·cer·ci·a·sis

Pronunciation: \ˌäŋ-kō-ˌsər-ˈkī-ə-səs\

Function: noun

Inflected Form(s): plural on·cho·cer·ci·a·ses \-ˌsēz\

Etymology: New Latin, from Onchocerca, genus of worms

Date: 1911

: 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