# unio

> English word · Noun

## Definitions
1. Any of the genus Unio of freshwater mussels

## Etymology
From the genus name, Unio, from Latin ūniō (“large pearl”). Doublet of union.

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