Source : Webster's Revised Unabridged Dictionary (1913)

Menhaden \Men*ha"den\, n. (Zo["o]l.)
   An American marine fish of the Herring familt ({Brevoortia
   tyrannus}), chiefly valuable for its oil and as a component
   of fertilizers; -- called also {mossbunker}, {bony fish},
   {chebog}, {pogy}, {hardhead}, {whitefish}, etc.

Source : WordNet®

menhaden
     n : shad-like North American marine fishes used for fish meal
         and oil and fertilizer [syn: {Brevoortia tyrannis}]