Threadworm

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threadworm (pinworm) Small roundworm of the phylum Aschelminthes. It is most common in moist tropical regions and resembles a short length of hair or thread. It may inhabit the intestines of human beings and other animals, but can live and breed freely in soil. Species Oxyurus vermicularis.

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threadworm (pinworm) (thred-werm) n. a parasitic nematode worm of the genus Enterobius (Oxyuris), which lives in the upper part of the human large intestine. Threadworms cause enterobiasis, a disease common in children throughout the world.

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thread·worm / ˈ[unvoicedth]redˌwərm/ • n. a very slender parasitic nematode worm, esp. a pinworm.