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Lactose in Irish (Lachtós): Meaning, Pronunciation, Usage

The Irish for lactose is lachtós, a masculine noun.
Updated October 2026Report a mistake

How to say “lactose” in Irish

Irish:
lachtós
English:
lactose
Word type:
noun
Gender:
masculine
Pronunciation:
“LAKH-tohs”  /ˈl̪ˠaxt̪ˠoːsˠ/
Various forms
Genitive singular:
lachtóis, an lachtóis (e.g. éadulaingt lachtóis, lactose intolerance)

What does “lachtós” mean?

lactose
Lactose is the natural sugar found in milk and dairy products.Also: milk sugar.

“Lachtós” with the article

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

an lachtós
the lactose
No change after an

“Lachtós” in a sentence: Irish examples

Common Irish sentences using lachtós, the Irish word for lactose.

Tá lachtós i mbainne bó.
Cow's milk contains lactose.
Ní féidir liom lachtós a dhíleá.
I can't digest lactose.
Tá éadulaingt lachtóis ar mo dheartháir.
My brother is lactose intolerant.
Is siúcra é an lachtós.
Lactose is a sugar.
Níl aon lachtós sa bhainne seo.
There is no lactose in this milk.
Ceannaím bainne gan lachtós anois.
I buy lactose-free milk now.
Cuireann an lachtós pian boilg orm.
Lactose gives me a stomach ache.

Other nouns in Irish

More everyday Irish nouns to learn next.

Lactose in Irish: frequently asked questions

What is the Irish for lactose?

The Irish for lactose is lachtós (pronounced “LAKH-tohs”). It’s a masculine noun.

How do you pronounce lachtós in Irish?

Lachtós is said like “LAKH-tohs” (IPA /ˈl̪ˠaxt̪ˠoːsˠ/).

Does lachtós have a plural?

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

How do I say 'lactose-free' in Irish?

Use 'gan lachtós', for example 'bainne gan lachtós' for lactose-free milk.

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