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Related to hairworm: horsehair worm
1. See horsehair worm.
2. Any of various slender parasitic nematode worms, especially those of the genus Trichostrongylus that infest the stomach and small intestine of cattle, sheep, and related animals, and those of the genus Capillaria that infest the digestive system of poultry and other animals.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. (Animals) any hairlike nematode worm of the family Trichostrongylidae, such as the stomach worm, parasitic in the intestines of vertebrates
2. (Animals) Also called: horsehair worm any very thin long worm of the phylum (or class) Nematomorpha, the larvae of which are parasitic in arthropods
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
any small, slender worm of the family Trichostrongylidae, parasitic in the alimentary canals of various animals.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.