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Dioxide in Irish (Dé-ocsaíd): Meaning, Pronunciation, Usage

The Irish for dioxide is dé-ocsaíd, a feminine noun.
Updated October 2026Report a mistake

How to say “dioxide” in Irish

Irish:
dé-ocsaíd
English:
dioxide
Word type:
noun
Gender:
feminine, second declension
Pronunciation:
“DAY-ok-seed”  /ˈdʲeːˌɔkˌsiːdʲ/
Various forms
Genitive singular:
dé-ocsaíde, na dé-ocsaíde (e.g. astaíochtaí dé-ocsaíde carbóin, carbon dioxide emissions)

What does “dé-ocsaíd” mean?

dioxide
A chemical compound in which each molecule has two atoms of oxygen joined to another element.Also: oxide with two oxygen atoms.

“Dé-ocsaíd” with the article

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

an dé-ocsaíd
the dioxide
No change: d and t are not lenited after an

“Dé-ocsaíd” in a sentence: Irish examples

Common Irish sentences using dé-ocsaíd, the Irish word for dioxide.

Is gás gan dath í dé-ocsaíd charbóin.
Carbon dioxide is a colourless gas.
Táimid ag foghlaim faoin dé-ocsaíd sa rang eolaíochta.
We are learning about dioxide in science class.
Scaoileann gluaisteáin dé-ocsaíd charbóin san aer.
Cars release carbon dioxide into the air.
Tá leibhéal na dé-ocsaíde carbóin ag ardú.
The level of carbon dioxide is rising.
Ionsúnn crainn dé-ocsaíd charbóin ón atmaisféar.
Trees absorb carbon dioxide from the atmosphere.
Is truailleán contúirteach í dé-ocsaíd sulfair.
Sulphur dioxide is a dangerous pollutant.
Tá méid mór dé-ocsaíde san aer cathrach.
There is a large amount of dioxide in city air.

Other nouns in Irish

More everyday Irish nouns to learn next.

Dioxide in Irish: frequently asked questions

What is the Irish for dioxide?

The Irish for dioxide is dé-ocsaíd (pronounced “DAY-ok-seed”). It’s a feminine noun.

How do you pronounce dé-ocsaíd in Irish?

Dé-ocsaíd is said like “DAY-ok-seed” (IPA /ˈdʲeːˌɔkˌsiːdʲ/).

Does dé-ocsaíd have a plural?

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

Why does dé-ocsaíd change to dhé-ocsaíd or ndé-ocsaíd?

Irish changes the start of some words after certain words. After mo (my) dé-ocsaíd becomes mo dhé-ocsaíd (lenition), and after ár (our) or i (in) it becomes ár ndé-ocsaíd (eclipsis).

How do you say carbon dioxide in Irish?

It is 'dé-ocsaíd charbóin', with the genitive 'carbóin' lenited after the feminine noun.

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