-rə̇s noun
Etymology: New Latin, from oxy- (I) + -uris (from Greek oura tail) — more at -urous
1. capitalized : a genus (the type of the family Oxyuridae) of parasitic nematodes with a long slender tail and well-developed pharyngeal bulb
2. -es : any worm of Oxyuris or a related genus (as Enterobius ) : pinworm