cestoidea

from The Century Dictionary.

• A group of tentaculate Ctenophora having a compressed, bandlike body and containing the single family Cestidæ.
• An order of platyhelminths or flatworms, having no intestinal cavity; the tapeworms; Tæniata or Agastreæ.

from the GNU version of the Collaborative International Dictionary of English.

• noun plural (Zoöl.) A class of parasitic worms of the phylum Platyhelminthes (formerly Platelminthes) of which the tapeworms are the most common examples. The body is flattened, and usually but not always long, and composed of numerous joints or segments, each of which may contain a complete set of male and female reproductive organs. They have neither mouth nor intestine. See tapeworm.