# thunniform

> English word · Adjective

## Definitions
1. Resembling a tuna.
2. Swimming in the manner of a tuna, by undulation of the caudal fin.

## Etymology
From Latin thunnus (“tuna”) + -iform.

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