Pronunciation: (hook'wûrm"),[key] —n. 1. any of certain bloodsucking nematode worms, as Ancylostoma duodenale and Necator americanus, parasitic in the intestine of humans and other animals.
2. Also called hook'worm disease". a disease caused by hookworms, which may enter the body by ingestion or through the skin of the feet or legs, causing abdominal pain, nausea, and, if untreated, severe anemia.