Definition of tapeworm
: any of a class (Cestoda) of bilaterally symmetrical flatworms that are parasitic as adults in the intestines of vertebrates including humans and consist of a scolex usually with suckers or hooks followed posteriorly by an undifferentiated neck region from which buds off an often long chain of proglottids
- In most instances, adult tapeworms have little visible effect on their hosts except in heavy infections, which may result in anemia, weight loss, and various secondary manifestations.
- —Burton J. Bogitsh et al.
