HeyRua Get the app

Cysteine in Irish (Cistéin): Meaning, Pronunciation, Usage

The Irish for cysteine is cistéin, a feminine noun.
Updated October 2026Report a mistake

How to say “cysteine” in Irish

Irish:
cistéin
English:
cysteine
Word type:
noun
Gender:
feminine
Pronunciation:
“KISH-tchayn”  /ˈkʲɪʃtʲeːnʲ/
Various forms
Genitive singular:
cistéine, na cistéine (e.g. móilín cistéine, a cysteine molecule)

What does “cistéin” mean?

cysteine
Cysteine is an amino acid that contains sulphur and is found in many proteins.Also: amino acid, sulphur amino acid.

“Cistéin” with the article

Here is cistéin after the article (an t-alt).

an chistéin
the cysteine
Lenition: c becomes ch after an (feminine noun)

“Cistéin” in a sentence: Irish examples

Common Irish sentences using cistéin, the Irish word for cysteine.

Is aimínaigéad í cistéin.
Cysteine is an amino acid.
Tá sulfar sa chistéin.
Cysteine contains sulphur.
Faightear cistéin i go leor próitéiní.
Cysteine is found in many proteins.
Rinneamar staidéar ar struchtúr na cistéine inniu.
We studied the structure of cysteine today.
Tá an chistéin tábhachtach don ghruaig agus do na hingne.
Cysteine is important for hair and nails.
Cén fhoirmle cheimiceach atá ag an gcistéin?
What is the chemical formula of cysteine?
Bíonn leibhéal ard cistéine in uibheacha.
Eggs have a high level of cysteine.

Other nouns in Irish

More everyday Irish nouns to learn next.

Cysteine in Irish: frequently asked questions

What is the Irish for cysteine?

The Irish for cysteine is cistéin (pronounced “KISH-tchayn”). It’s a feminine noun.

How do you pronounce cistéin in Irish?

Cistéin is said like “KISH-tchayn” (IPA /ˈkʲɪʃtʲeːnʲ/).

Does cistéin have a plural?

No plural form is given for cistéin in the standard. Many abstract and mass nouns in Irish have no plural.

Why does cistéin change to chistéin or gcistéin?

Irish changes the start of some words after certain words. After mo (my) cistéin becomes mo chistéin (lenition), and after ár (our) or i (in) it becomes ár gcistéin (eclipsis).

Is 'cistéin' related to 'cistin' (kitchen)?

No. 'Cistéin' is the amino acid cysteine, while 'cistin' means kitchen; they only look similar.

Learn Irish by
actually speaking it

Learn everyday Irish words like cistéin through guided conversation with Rua.

7-day free trial. Cancel anytime.

The HeyRua app home screen