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Definition of fin whale

fin whale

Plural:fin whales
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• noun

1

A large, slender baleen whale (Balaenoptera physalus) found in all major oceans, recognized as the second-largest mammal species on Earth after the blue whale, characterized by a prominent dorsal fin and asymmetrical coloration on its lower jaw.

Example

"During the marine biology expedition in the North Atlantic, the researchers tracked a fast-swimming fin whale by listening to its low-frequency vocalizations."

Synonyms
View all synonyms for fin whale

• Nearby Words

fimi
fimi river
fin
fin whale
finagle
finagler
final

Usage Trend

Historical frequency of usage in published text.

180019102020
Data source: Google Books Ngram Viewer

Cite this Entry

Wordmom. (2026). Definition of Fin whale. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/fin-whale
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