balaenoidea

from The Century Dictionary.

• One of the three primary groups into which the Cetacea are divisible, the other two being the Delphinoidea and the Phocodontia. It embraces the right whales (Balæna) and the fin-whales (Balænoptera, etc.).

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

• noun (Zoöl) A division of the Cetacea, including the right whale and all other whales having the mouth fringed with baleen. See baleen.