Medical Definition of kidney worm
: any of several nematode worms parasitic in the kidneys: asa: giant kidney wormb: 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
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