Any of the parasitic nematode worms of superfamily Filarioidea that live in the blood of vertebrates and is transmitted by insects: the cause of filariasis.
User Defined Definitions
"European weed naturalized in southwestern United States and Mexico having reddish decumbent stems with small fernlike leaves and small deep reddish-lavender flowers followed by slender fruits that sti"
"slender threadlike roundworms living in the blood and tissues of vertebrates; transmitted as larvae by biting insects"