sei whale

sei whale

n.

A rorqual (Balaenoptera borealis) that is blue-black above and white below, that grows up to about 55 feet (17 meters) in length, and that is found in all the oceans, with the greatest number living in Antarctic waters.

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[Partial translation of Norwegian seihval; see sei.]

Thesaurus

Noun

1.

sei whale - similar to but smaller than the finback whale Balaenoptera borealis rorqual, razorback - any of several baleen whales of the family Balaenopteridae having longitudinal grooves on the throat and a small pointed dorsal fin Balaenoptera, genus Balaenoptera - type genus of the Balaenopteridae