Main Entry:

pin·worm

Pronunciation:

\-ˌwərm\

Function:

noun

Date:

circa 1864

1: any of numerous small nematode worms (family Oxyuridae) that infest the intestines and especially the cecum of various vertebrates ; especially : a worm (Enterobius vermicularis) parasitic in humans2: any of several rather slender insect larvae that burrow in plant tissue