Nemathelmia, or NEMATHELMINTHES (Gr. nēma, 'a thread,' and helmins, 'an intestinal worm'), a general name applied to the thread-worms or nematodes, such as Ascaris (q.v.), Guinea-worm (q.v.), Trichina (q.v.), to the somewhat distinct
Gordiidae or hair-eels, and to the more remotely allied Acanthocephala or Echinorhynchus (q.v.).