kidney worm
nounMedical Definition of kidney worm
: any of several nematode worms parasitic in the kidneys: as
b
: a common and destructive black-and-white worm of the genus Stephanurus (S. dentatus) that is related to the gapeworm but attains a length of two inches (five centimeters) and is parasitic in the kidneys, lungs, and other viscera of the hog in warm regions
— called also lardworm