cysteine
Syllables: cys·te·ine/ˈsɪs.təˌiːn/US/ˈsɪs.təˌin/
cysteine noun: a sulphur-containing nonessential amino acid C₃H₇NO₂S found in most animal proteins; it readily oxidizes to cystine.
Noun
cysteine (countable and uncountable, plural cysteines)
- A sulphur-containing nonessential amino acid C₃H₇NO₂S found in most animal proteins; it readily oxidizes to cystine.
- Synonyms:
- E910 when used as a food additive, E920 when used as an improving agent, Cys when viewed as a monomer in proteins
cysteine meaning in Indonesian and Persian
cysteine in Indonesian
- nonessential amino acid
- sistein
cysteine in Persian
- nonessential amino acid
- سیستئین siste'in
Synonyms of cysteine
- E910 when used as a food additive
- E920 when used as an improving agent
- Cys when viewed as a monomer in proteins
Forms of cysteine
| plural | cysteines |
|---|
Origin of cysteine
An alteration of cystine, see -eine.
Words formed from cysteine
Words that rhyme with cysteine
Questions about cysteine
- What does cysteine mean?
- Cysteine means a sulphur-containing nonessential amino acid C₃H₇NO₂S found in most animal proteins; it readily oxidizes to cystine.
- What is cysteine in Indonesian?
- Cysteine in Indonesian is sistein. See Cysteine meaning in Indonesian.
- What part of speech is cysteine?
- Cysteine is a noun.
- How do you pronounce cysteine?
- Cysteine is pronounced /ˈsɪs.təˌiːn/ (UK).
- What is the plural of cysteine?
- The plural of cysteine is cysteines.
Words near cysteine in the dictionary
Source and license
Adapted from Wiktionary: cysteine (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.
Last updated:
Pronunciation audio from Wikimedia Commons, each file under its own free license: LL-Q1860 (eng)-Vealhurl-cysteine.wav.
Cite this entry: “cysteine.” Word.ws, https://word.ws/cysteine. Based on Wiktionary, CC BY-SA 4.0.