Enterobius vermicularis is a type of parasitic worm that commonly infects humans. It is also known by various other names, including pinworm, threadworm, and oxyuris. Pinworms are tiny white worms that live in the large intestine and rectum of humans. They are often spread through poor hygiene and can cause uncomfortable symptoms like itching and irritation around the anus. Other synonyms for Enterobius vermicularis include human pinworm, enterobiasis, and helminthiasis. Although they may not be pleasant to think about, understanding the variety of names associated with this parasite is important for identifying and treating infections caused by it.