# CMOS

> English word · Noun · IPA /ˈsiːmɒs/ · frequency rank #31,112

## Definitions
1. Initialism of complementary metal–oxide–semiconductor.

## Etymology
From C (“complementary”) + MOS.

## Easily confused with
- **co** (https://plainspell.com/en/vs/cmos-vs-co)
- **cs** (https://plainspell.com/en/vs/cmos-vs-cs)
- **cop** (https://plainspell.com/en/vs/cmos-vs-cop)
- **con** (https://plainspell.com/en/vs/cmos-vs-con)
- **cow** (https://plainspell.com/en/vs/cmos-vs-cow)
- **cos** (https://plainspell.com/en/vs/cmos-vs-cos)
- **col** (https://plainspell.com/en/vs/cmos-vs-col)
- **cox** (https://plainspell.com/en/vs/cmos-vs-cox)
- **cod** (https://plainspell.com/en/vs/cmos-vs-cod)
- **CSS** (https://plainspell.com/en/vs/cmos-vs-css)
- **CPS** (https://plainspell.com/en/vs/cmos-vs-cps)
- **CMS** (https://plainspell.com/en/vs/cmos-vs-cms)
- **CVS** (https://plainspell.com/en/vs/cmos-vs-cvs)
- **cor** (https://plainspell.com/en/vs/cmos-vs-cor)
- **coo** (https://plainspell.com/en/vs/cmos-vs-coo)
- **cot** (https://plainspell.com/en/vs/cmos-vs-cot)
- **Coe** (https://plainspell.com/en/vs/cmos-vs-coe)
- **coz** (https://plainspell.com/en/vs/cmos-vs-coz)
- **coa** (https://plainspell.com/en/vs/cmos-vs-coa)
- **coy** (https://plainspell.com/en/vs/cmos-vs-coy)

## Common misspellings (5)
`ccmos`, `cmmos`, `cmoss`, `cmso`, `mcos`

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