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Cytosine in Irish (Cíotóisín): Meaning, Pronunciation, Usage

The Irish for cytosine is cíotóisín, a masculine noun (plural cíotóisíní).
Updated October 2026Report a mistake

How to say “cytosine” in Irish

Irish:
cíotóisín
English:
cytosine
Word type:
noun
Gender:
masculine
Pronunciation:
“KEE-toh-sheen”  /ˈciːt̪ˠoːʃiːnʲ/
Various forms
Plural:
cíotóisíní (cytosines)
Genitive singular:
cíotóisín, an chíotóisín (e.g. struchtúr an chíotóisín, the structure of cytosine)
Genitive plural:
cíotóisíní, na gcíotóisíní (e.g. líon na gcíotóisíní, the number of cytosines)

What does “cíotóisín” mean?

cytosine
A nitrogen-containing base found in DNA and RNA, one of the four letters of the genetic code.Also: nucleobase, pyrimidine base, dna base.

“Cíotóisín” with the article

The plural of cytosine in Irish is cíotóisíní. Here is cíotóisín after the article (an t-alt), in the singular and the plural.

an cíotóisín
the cytosine
No change after an
na cíotóisíní
the cytosines
Plural: no change after na

“Cíotóisín” in a sentence: Irish examples

Common Irish sentences using cíotóisín, the Irish word for cytosine.

Is bonn nítrigineach é cíotóisín.
Cytosine is a nitrogenous base.
Péireálann an cíotóisín le guanaín.
Cytosine pairs with guanine.
Tá cíotóisín le fáil i DNA agus i RNA.
Cytosine is found in DNA and in RNA.
Rinneamar staidéar ar fhoirmle an chíotóisín inniu.
We studied the formula of cytosine today.
Tá go leor cíotóisíní sa slabhra seo.
There are many cytosines in this strand.
Seasann an litir C do chíotóisín.
The letter C stands for cytosine.
Athraíodh an cíotóisín sa ghéin sin.
The cytosine in that gene was changed.

Other nouns in Irish

More everyday Irish nouns to learn next.

Cytosine in Irish: frequently asked questions

What is the Irish for cytosine?

The Irish for cytosine is cíotóisín (pronounced “KEE-toh-sheen”). It’s a masculine noun and the plural is cíotóisíní.

How do you pronounce cíotóisín in Irish?

Cíotóisín is said like “KEE-toh-sheen” (IPA /ˈciːt̪ˠoːʃiːnʲ/).

What is the plural of cytosine in Irish?

The plural of cíotóisín is cíotóisíní; with the article, na cíotóisíní means “the cytosines”. The genitive plural is cíotóisíní, as in líon na gcíotóisíní (the number of cytosines).

Why does cíotóisín change to chíotóisín or gcíotóisín?

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

Which base does cíotóisín pair with?

In DNA, cíotóisín pairs with guanaín (guanine).

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