Source : Webster's Revised Unabridged Dictionary (1913)

Balaenoidea \Bal`[ae]*noi"de*a\, n. [NL., from L. balaena whale
   + -oid.] (Zo["o]l)
   A division of the Cetacea, including the right whale and all
   other whales having the mouth fringed with baleen. See
   {Baleen}.