Cestoda
noun plural
Ces·to·da
| \ ses-ˈtōd-ə
\
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Medical Definition of Cestoda
: a class of the phylum Platyhelminthes comprising the tapeworms and including dorsoventrally flattened parasitic usually segmented flatworms without cilia that lack a digestive tract and typically consist of a differentiated scolex and a chain of proglottides each including a set of reproductive organs