Definify.com

Webster 1913 Edition

Noun.

(Zool.)

A small nematoid worm (

Oxyurus vermicularis

), which is parasitic chiefly in the rectum of man. It is most common in children and aged persons.

pinworm ‎(plural pinworms)

Any of several nematode worms, of the family Oxyuridae, that are parasitic to mammals

any of several nematode worms, of the family Oxyuridae, that are parasitic to mammals