ascarid
noun
as·ca·rid ˈa-skə-rəd 
: any of a family (Ascaridae) of nematode worms that includes the common roundworm (Ascaris lumbricoides) parasitic in the human intestine
Word History
Etymology
ultimately from Late Latin ascarid-, ascaris intestinal worm, from Greek askarid-, askaris, probably by back-formation from askarizein to jump, throb, alteration of skarizein, from skairein to gambol
First Known Use
14th century, in the meaning defined above
Medical Definition
ascarid
noun
as·ca·rid ˈas-kə-rəd
: a nematode worm of the family Ascaridae