Type: Term Pronunciation: ok′sē-yū′ris Definitions: 1. A genus of nematodes commonly called seatworms or pinworms (although the pinworm of humans is the closely related form, Enterobius vermicularis). Oxyuris equi, the horse pinworm, is a common parasite of horses in all parts of the world, inhabiting the large intestine. ... Found on http://www.medilexicon.com/medicaldictionary.php?t=64279