Finback
Pronunciation : Fin"back`
Part of Speech : n.
Definition : Defn: Any whale of the genera Sibbaldius, Bal?noptera, and allied genera, of the family Bal?nopterid?, characterized by a prominent fin on the back. The common finbacks of the New England coast are Sibbaldius tectirostris and S. tuberosus.
(Zo?l.)
Source : Webster's Unabridged Dictionary, 1913