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Monoxide in Irish (Aonocsaíd): Meaning, Pronunciation, Usage

The Irish for monoxide is aonocsaíd, a feminine noun.
Updated October 2026Report a mistake

How to say “monoxide” in Irish

Irish:
aonocsaíd
English:
monoxide
Word type:
noun
Gender:
feminine
Pronunciation:
“AYN-ok-see-j”  /ˈeːnˌɔksiːdʲ/
Various forms
Genitive singular:
aonocsaíde, na haonocsaíde (e.g. nimhiú aonocsaíde, monoxide poisoning)

What does “aonocsaíd” mean?

monoxide
A chemical compound in which each molecule has one oxygen atom joined to another element.

“Aonocsaíd” with the article

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

an aonocsaíd
the monoxide
No change: feminine nouns starting with a vowel keep their form after an

“Aonocsaíd” in a sentence: Irish examples

Common Irish sentences using aonocsaíd, the Irish word for monoxide.

Is gás nimhiúil í aonocsaíd charbóin.
Carbon monoxide is a poisonous gas.
Ní féidir aonocsaíd charbóin a bholadh.
You cannot smell carbon monoxide.
Cheannaíomar brathadóir aonocsaíde don teach.
We bought a monoxide detector for the house.
Tá an aonocsaíd an-chontúirteach i seomra dúnta.
Monoxide is very dangerous in a closed room.
Fuair sé bás de bharr nimhiú aonocsaíde.
He died from monoxide poisoning.
Tagann aonocsaíd ó dhó neamhiomlán breosla.
Monoxide comes from incomplete burning of fuel.
D'fhoghlaimíomar faoin aonocsaíd sa rang ceimice.
We learned about monoxide in chemistry class.

Other nouns in Irish

More everyday Irish nouns to learn next.

Monoxide in Irish: frequently asked questions

What is the Irish for monoxide?

The Irish for monoxide is aonocsaíd (pronounced “AYN-ok-see-j”). It’s a feminine noun.

How do you pronounce aonocsaíd in Irish?

Aonocsaíd is said like “AYN-ok-see-j” (IPA /ˈeːnˌɔksiːdʲ/).

Does aonocsaíd have a plural?

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

Why does aonocsaíd sometimes have a t or h in front of it?

Irish nouns beginning with a vowel take a prefix after certain words: an aonocsaíd (the monoxide), a haonocsaíd (her monoxide), a n-aonocsaíd (their monoxide).

How do you say carbon monoxide in Irish?

It is aonocsaíd charbóin, with carbón lenited in the genitive after the feminine noun.

What is the difference between aonocsaíd and dé-ocsaíd?

Aonocsaíd has one oxygen atom (monoxide), while dé-ocsaíd has two (dioxide), as in dé-ocsaíd charbóin.

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