Definition: The hairworm, or bankrupt or black scour worm; an economically important genus (about 30 species) of small slender nematodes (family Trichostrongylidae) that inhabit the small intestine, in some cases the stomach, of a variety of herbivorous animals and gallinaceous birds. They burrow into the mucosa and suck blood; in large numbers they do serious damage, especially to young hosts.
[tricho- + G. strongylos, round]
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