- A division of this Cetacea, like the right whale and all other whales getting the lips fringed with baleen. See baleen.
- one of many three primary groups into that the Cetacea tend to be divisible, others two becoming the Delphinoidea therefore the Phocodontia. It embraces the proper whales (Balæna) while the fin-whales (Balænoptera, etc.).