# serine

> English word · Noun · frequency rank #45,078

## Definitions
1. A nonessential amino acid, CH₂OH.CH(NH₂)COOH, found in most animal proteins, notably silk.

## Etymology
From Latin sericus (“silken”). The compound was first obtained from silk protein, a particularly rich source, in 1865. See also serge.

## Easily confused with
- **sine** (https://plainspell.com/en/vs/serine-vs-sine)
- **serve** (https://plainspell.com/en/vs/serine-vs-serve)
- **shine** (https://plainspell.com/en/vs/serine-vs-shine)
- **spine** (https://plainspell.com/en/vs/serine-vs-spine)
- **swine** (https://plainspell.com/en/vs/serine-vs-swine)
- **spring** (https://plainspell.com/en/vs/serine-vs-spring)
- **strike** (https://plainspell.com/en/vs/serine-vs-strike)
- **string** (https://plainspell.com/en/vs/serine-vs-string)
- **sprint** (https://plainspell.com/en/vs/serine-vs-sprint)
- **shrine** (https://plainspell.com/en/vs/serine-vs-shrine)
- **shrink** (https://plainspell.com/en/vs/serine-vs-shrink)
- **strive** (https://plainspell.com/en/vs/serine-vs-strive)
- **sewing** (https://plainspell.com/en/vs/serine-vs-sewing)
- **stripe** (https://plainspell.com/en/vs/serine-vs-stripe)
- **stride** (https://plainspell.com/en/vs/serine-vs-stride)
- **strife** (https://plainspell.com/en/vs/serine-vs-strife)
- **sprite** (https://plainspell.com/en/vs/serine-vs-sprite)
- **service** (https://plainspell.com/en/vs/serine-vs-service)
- **serving** (https://plainspell.com/en/vs/serine-vs-serving)
- **sterile** (https://plainspell.com/en/vs/serine-vs-sterile)

## Common misspellings (8)
`esrine`, `seirne`, `serien`, `serinne`, `sernie`, `serrine`, `sreine`, `sserine`

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