# neocortex

> English word · Noun · frequency rank #73,473

## Definitions
1. The top layer of the cerebral hemispheres in the brain of mammals; part of the cerebral cortex.

## Etymology
From neo- + cortex.

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