hairworm(redirected from hairworms)
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hairworm,worm of the phylum NematomorphaNematomorpha
, small (about 230 species) phylum of pseudocoelomates; the horsehair worms. Most are very slender, elongated creatures found in ponds and streams, whose larvae live as parasites in arthropods. They emerge as adults for a brief time, then mate and die.
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The common name for about 80 species of worms composing the class Nematomorpha.