finback Meaning, Definition & Usage

  1. noun large flat-headed whalebone whale having deep furrows along the throat; of Atlantic and Pacific
    fin whale; common rorqual; finback whale; Balaenoptera physalus.

WordNet

Fin"back` noun
Definitions
  1. (Zoöl.) Any whale of the genera Sibbaldius, Balænoptera, and allied genera, of the family Balænopteridæ, characterized by a prominent fin on the back. The common finbacks of the New England coast are Sibbaldius tectirostris and S. tuberosus.

Webster 1913