| Noun | 1. | worm - any of numerous relatively small elongated soft-bodied animals especially of the phyla Annelida and Chaetognatha and Nematoda and Nemertea and Platyhelminthes; also many insect larvae Aschelminthes, Nematoda, phylum Aschelminthes, phylum Nematoda - unsegmented worms: roundworms; threadworms; eelworms Ascaris lumbricoides, common roundworm - intestinal parasite of humans and pigs Ascaridia galli, chicken roundworm - intestinal parasite of domestic fowl Enterobius vermicularis, pinworm, threadworm - small threadlike worm infesting human intestines and rectum especially in children eelworm - any of various small free-living plant-parasitic roundworms trichina, Trichinella spiralis - parasitic nematode occurring in the intestines of pigs and rats and human beings and producing larvae that form cysts in skeletal muscles hookworm - parasitic bloodsucking roundworms having hooked mouth parts to fasten to the intestinal wall of human and other hosts filaria - slender threadlike roundworms living in the blood and tissues of vertebrates; transmitted as larvae by biting insects Dracunculus medinensis, Guinea worm - parasitic roundworm of India and Africa that lives in the abdomen or beneath the skin of humans and other vertebrates |