tapeworm

/ˈteɪpwɜːrm/
noun
  1. A long, flat, parasitic worm that lives in the intestines of animals and humans, often causing digestive problems and weight loss.
    • Eating undercooked pork can sometimes lead to a tapeworm infection.
    • Tapeworms can grow several feet long inside a host's intestines.
    • The vet found a tapeworm in the stray cat's stool sample.