A genus of elongated filariform nematodes that inhabit the connective tissue of their hosts, usually within firm nodules in which they are coiled and entangled.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Examples from the Web for onchocerca
Another curious filaria-like entozoon is the reticulated threadworm (Onchocerca reticulata).Parasites|T. Spencer Cobbold