# cyst

> English word · Noun · IPA /sɪst/ · frequency rank #24,720

## Definitions
1. A pouch or sac without opening, usually membranous and containing morbid matter, which develops in one of the natural cavities or in the substance of an organ.

## Etymology
From Late Latin cystis, from Ancient Greek κύστις (kústis, “anatomical sac”).

## Easily confused with
- **cysts** (https://plainspell.com/en/vs/cyst-vs-cysts)
- **cystic** (https://plainspell.com/en/vs/cyst-vs-cystic)
- **CT** (https://plainspell.com/en/vs/ct-vs-cyst)
- **cs** (https://plainspell.com/en/vs/cs-vs-cyst)
- **cut** (https://plainspell.com/en/vs/cut-vs-cyst)
- **cat** (https://plainspell.com/en/vs/cat-vs-cyst)
- **CBS** (https://plainspell.com/en/vs/cbs-vs-cyst)
- **cos** (https://plainspell.com/en/vs/cos-vs-cyst)
- **CDs** (https://plainspell.com/en/vs/cds-vs-cyst)
- **cis** (https://plainspell.com/en/vs/cis-vs-cyst)
- **cas** (https://plainspell.com/en/vs/cas-vs-cyst)
- **CSS** (https://plainspell.com/en/vs/css-vs-cyst)
- **CPS** (https://plainspell.com/en/vs/cps-vs-cyst)
- **CMS** (https://plainspell.com/en/vs/cms-vs-cyst)
- **CVS** (https://plainspell.com/en/vs/cvs-vs-cyst)
- **CSI** (https://plainspell.com/en/vs/csi-vs-cyst)
- **cot** (https://plainspell.com/en/vs/cot-vs-cyst)
- **CES** (https://plainspell.com/en/vs/ces-vs-cyst)
- **CSR** (https://plainspell.com/en/vs/csr-vs-cyst)
- **CSA** (https://plainspell.com/en/vs/csa-vs-cyst)

## Common misspellings (7)
`ccyst`, `csyt`, `cysst`, `cystt`, `cyts`, `cyyst`, `ycst`

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