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Mucus in Irish (Múcas): Meaning, Pronunciation, Usage

The Irish for mucus is múcas, a masculine noun.
Updated October 2026Report a mistake

How to say “mucus” in Irish

Irish:
múcas
English:
mucus
Word type:
noun
Gender:
masculine, first declension
Pronunciation:
“MOO-kus”  /ˈmuːkəs/
Various forms
Genitive singular:
múcais, an mhúcais (e.g. táirgeadh múcais, production of mucus)

What does “múcas” mean?

mucus
A thick, slimy fluid produced by the lining of the nose, throat and other parts of the body.Also: phlegm, slime, mucous secretion.

Other Irish words for mucus: smuga (mucus)

“Múcas” with the article

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

an múcas
the mucus
No change after an

“Múcas” in a sentence: Irish examples

Common Irish sentences using múcas, the Irish word for mucus.

Bíonn múcas sa tsrón nuair a bhíonn slaghdán ort.
There is mucus in your nose when you have a cold.
Cosnaíonn an múcas na scamhóga ar dheannach.
The mucus protects the lungs from dust.
Tá an iomarca múcais i mo scornach inniu.
There is too much mucus in my throat today.
Dúirt an dochtúir go raibh dath aisteach ar an múcas.
The doctor said the mucus was a strange colour.
Déanann an corp múcas chun na baill a chosaint.
The body makes mucus to protect the organs.
Cuireann an leigheas seo an múcas i scaoileadh.
This medicine loosens the mucus.
Is sruthán tiubh múcais a bhí ann.
It was a thick stream of mucus.

Other nouns in Irish

More everyday Irish nouns to learn next.

Mucus in Irish: frequently asked questions

What is the Irish for mucus?

The Irish for mucus is múcas (pronounced “MOO-kus”). It’s a masculine noun.

How do you pronounce múcas in Irish?

Múcas is said like “MOO-kus” (IPA /ˈmuːkəs/).

Does múcas have a plural?

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

Why does múcas change to mhúcas?

After words like mo (my) and do (your) the first letter is lenited: mo mhúcas. After ár (our) it stays ár múcas, because m does not take eclipsis.

What is the everyday word for snot or phlegm, as opposed to múcas?

Múcas is the technical term; in everyday speech people say smug for nasal mucus and réama for phlegm.

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