# cataplexy

> English word · Noun · IPA /ˈkætəˌplɛksi/

## Definitions
1. An abrupt loss of muscle tone, sometimes associated with narcolepsy.

## Etymology
From German Kataplexie, from Ancient Greek κατάπληξις (katáplēxis), from κατά (katá, “down”) + πλῆξῐς (plêxĭs, “blow, act of striking”).

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