Medical Definition of onchocerciasis
plural on·cho·cer·ci·a·ses \-ˌsēz\play
: infestation with or disease caused by filarial worms of the genus Onchocerca; especially : a human disease that is marked by subcutaneous nodules, dermatitis, and visual impairment and is caused by a worm (O. volvulus) which is found in Africa and tropical America and transmitted by the bite of a female blackfly—called also onchocercosis, river blindness; see craw-craw
Seen and Heard
What made you want to look up onchocerciasis? Please tell us where you read or heard it (including the quote, if possible).