# sea horse

> English word · Noun

## Definitions
1. Any of the small fish of the genus Hippocampus that have a horselike head and swim upright.
2. Any of a series of high-value British stamps issued during the reign of King George V, featuring a depiction of Britannia on a chariot in choppy seas.
3. A hippopotamus.
4. A walrus.
5. Synonym of hippocampus.

## Etymology
From Middle English sehors (“walrus”), equivalent to sea + horse. Probably a calque of obsolete French cheval de mer or directly of Late Latin caballus marinus.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/sea-horse