(countable) Any parasiticalworm of the class Cestoda, which infest the intestines of animals, including humans, often infecting different host species during their life cycle.
(countable) A , .
(uncountable) Infestation by tapeworms.
1967, Senator Hill, United States. Congress. Senate, Labor--Health, Education, and Welfare appropriations for 1968: Hearings before the subcommittee of the Committee on Appropriations, We used to have a lot of tapeworm down in my neck of the woods, but we don't have much now.