A genus of spiruroid nematodes that inhabit the lacrimal ducts and surface of the eyes of various domestic and wild animals but rarely of humans.
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 thelazia
Historical Examples of thelazia
Several species all belonging to the same genus (Thelazia) are known.Special Report on Diseases of Cattle
U.S. Department of Agriculture