# catadromous

> English word · Adjective

## Definitions
1. Living in fresh water as an adult, but breeding in the sea.
2. Of a fern in which the first veins in a frond segment are produced towards the base of the frond.

## Etymology
From cata- + -dromous, by analogy with anadromous. Compare catanadromous.

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