fin whale

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A large baleen whale (Balaenoptera physalus) having grooves on the throat, a prominent dorsal fin, and a whitish underside.

from The Century Dictionary.

• noun Same as finner.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun a whale of the rorqual family (Balaenoptera physalus)

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun large flat-headed whalebone whale having deep furrows along the throat; of Atlantic and Pacific