# Fisherian runaway

> English word · Noun

## Definitions
1. A suggested sexual selection mechanism to account for the evolution of exaggerated male ornamentation (such as a peacock's plumage) by persistent, directional female choice.

## Etymology
After Ronald Fisher, who proposed it in the early 20th century.

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