Medical Definition of Filarioidea
: a large superfamily of nematodes of the order Spirurida that comprises the medically important filarial worms and related forms having a slender thready body, a simple anterior end with the oral lips inconspicuous, a cylindrical esophagus lacking a bulbus, and often unequal and dissimilar copulatory spicules in the male
filarioid\fə-ˈlar-ē-ˌȯid, -ˈler-\play adjective
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