seahorse

noun

sea·​horse ˈsē-ˌhȯrs How to pronounce seahorse (audio)
plural seahorses
1
: any of a genus (Hippocampus of the family Syngnathidae) of small bony fishes that have the head angled downward toward the body which is carried vertically and are equipped with a prehensile tail
2
: a mythical creature half horse and half fish
3
: walrus

Illustration of seahorse

Illustration of seahorse
  • seahorse 1

Examples of seahorse 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.
The Winter Haven aquarium will feature more than 3,000 marine animals, including stingrays and big-belly seahorses. Dewayne Bevil, The Orlando Sentinel, 9 May 2025 Runners up included various sharks, the longfin eel and the big-belly seahorse. Sarah Kuta, Smithsonian Magazine, 20 Mar. 2025 For fans, the crest represents the feelings and emotions Robson outlines; the connection to their home, through the unique, captivating seahorses there to represent the River Tyne, standing beside a black and white shield, below the castle from which the city bears its name. Harry De Cosemo, Forbes.com, 9 May 2025 Visitors will see a freshwater swamp area, Stingray Bay, Key West Harbor as well as tanks for big-belly seahorses. Dewayne Bevil, Orlando Sentinel, 21 Mar. 2025 The resort is spread across two tiny islands that are linked by a footbridge over the country’s first marine reserve, developed to safeguard turtles, seahorses, and tropical fish. Laura Begley Bloom, AFAR Media, 25 Feb. 2025 Other Enhance La Jolla news Bench renewal: A project to renovate wooden benches in La Jolla’s public spaces is completed, Enhance La Jolla President Ed Witt said, and the board is eyeing the metal benches adorned with seahorses as a possible next project. Ashley MacKin Solomon, San Diego Union-Tribune, 20 Jan. 2025 Ocean secrets Fingernail-size pygmy seahorses are some of the smallest vertebrates on the planet, but British marine biologist Richard Smith makes their colorful world seem larger than life. Ashley Strickland, CNN, 18 Jan. 2025 After all, there are opportunities to see sea turtles, seahorses, sharks, eels, manta rays, and tropical fish in the wild. Erik Trinidad, Travel + Leisure, 27 Dec. 2024

Word History

First Known Use

15th century, in the meaning defined at sense 3

Time Traveler
The first known use of seahorse was in the 15th century

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Cite this Entry

“Seahorse.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/seahorse. Accessed 25 May. 2025.

Kids Definition

sea horse

noun
1
: a mythical animal half horse and half fish
2
: a small fish with bony plates covering its body and a head that looks like a horse's head
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