Medical Definition of nodular worm
: any of several nematode worms of the genus Oesophagostomum that are parasitic in the large intestine of ruminants and swine where they cause swellings of the intestinal wall resembling abscesses—called also nodule worm
Seen and Heard
What made you want to look up nodular worm? Please tell us where you read or heard it (including the quote, if possible).