Any of about 250–300 species (class Nematomorpha, or Gordiacea; phylum Aschelminthes) of long, thin worms. The young are parasites in arthropods; the adults are free-living in the sea or in freshwater. The hairlike body sometimes grows to a length of about 39 in. (1 m).
Variants of HORSEHAIR WORM
horsehair worm or hairworm or gordian worm
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