# polymicrogyria

> English word · Noun

## Definitions
1. A deformity of the brain such that it has an excessive number of small folds, causing mental retardation.

## Etymology
From poly- + micro- + gyrus + -ia.

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