pectoral fin

noun

: either of the fins of a fish that correspond to the forelimbs of a quadruped

Examples of pectoral fin in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Speaking of the battery, it's integrated directly into the pectoral fins. New Atlas, 8 Sep. 2025 They are so named for the black color on the tips of their dorsal and pectoral fins. David Goodhue, Miami Herald, 3 Sep. 2025 The sighting involved tail slapping and the whales slapping their pectoral fin against the ocean’s surface, boaters said. Paloma Chavez august 22, Sacbee.com, 22 Aug. 2025 Easily recognized by their slender bodies, long pectoral fins, and rounded snouts, this species is often seen cruising in the open ocean, particularly along the edges of continental shelves, around seamounts, and near offshore reefs. Melissa Cristina Márquez, Forbes.com, 6 Aug. 2025 See All Example Sentences for pectoral fin

Word History

First Known Use

1715, in the meaning defined above

Time Traveler
The first known use of pectoral fin was in 1715

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Cite this Entry

“Pectoral fin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pectoral%20fin. Accessed 11 Sep. 2025.

Kids Definition

pectoral fin

noun
: either of a pair of fins of a fish that correspond to the front limbs of a four-footed animal compare pelvic fin

More from Merriam-Webster on pectoral fin

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