spiny-headed worm(redirected from spiny-headed worms)
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Any of various worms of the phylum Acanthocephala that live parasitically in the intestines of vertebrates and are characterized by a cylindrical, retractile proboscis that bears many rows of hooked spines. Also called acanthocephalan, thorny-headed worm.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
1. An elongated invertebrate belonging to one of the following phyla: Platyhelminthes (flatworms); Nemathelminthes or Aschelminthes (roundworms or threadworms); Acanthocephala (spinyheaded worms); and Annelida (Annulata) (segmented worms). Synonym: helminth
2. Any small, limbless, creeping animal.
3. The median portion of the cerebellum.
4. Any wormlike structure.
A nematode worm (Dracunculus medinensis) that is a parasite affecting subcutaneous tissues of humans and animals, found in tropical Africa and South Asia. The worm causes infection when its larvae are drunk in unfiltered or unsanitary water. The larvae enter the body through the stomach or duodenum, migrate through internal organs, and become adults. After mating, the adult female burrows to the subcutaneous tissue, often of the leg. The worm has been eradicated in Asia. See: Medina wormSee: illustration
herring wormAnisakis simplex.
Medina wormGuinea worm.
The common name of worms of the genus Oesophagostomum.
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