# Landau-Kleffner syndrome

> English word · Noun

## Definitions
1. A rare childhood neurological syndrome, characterized by the sudden or gradual development of aphasia and an abnormal electroencephalogram.

## Etymology
Named after William Landau and Frank Kleffner, who characterized it in 1957.

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