As·car·i·dae noun pl \ə-ˈskar-ə-ˌdē\
: a family of large nematode worms (superfamily Ascaridoidea) that are usually parasitic in the intestines of vertebrates, have three well-developed lips and a simple cylindrical esophagus, and include the common roundworm (Ascaris lumbricoides) parasitic in the human intestine—see ascaridia, ascaris
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