HeyRua Get the app

Alga in Irish (Alga): Meaning, Pronunciation, Usage

The Irish for alga is alga, a masculine noun (plural algaí).
Updated October 2026Report a mistake

How to say “alga” in Irish

Irish:
alga
English:
alga
Word type:
noun
Gender:
masculine, fourth declension
Pronunciation:
“AL-uh-guh”  /ˈal̪ˠəɡə/
Various forms
Plural:
algaí (algae)
Genitive singular:
alga, an alga (e.g. fás an alga, the growth of the alga)
Genitive plural:
algaí, na n-algaí (e.g. fás na n-algaí, the growth of the algae)

What does “alga” mean?

alga
A simple plant-like organism without roots or leaves that grows in water or damp places, such as seaweed or pond scum.Also: algae, seaweed, pond scum.

“Alga” with the article

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

an t-alga
the alga
Masculine nouns take t before a vowel after an
na halgaí
the algae
Plural: na adds h before a vowel

“Alga” in a sentence: Irish examples

Common Irish sentences using alga, the Irish word for alga.

Is planda simplí é alga.
An alga is a simple plant.
Tá algaí glasa ag fás sa lochán.
Green algae are growing in the pond.
D'fhéach na daltaí ar an alga faoin micreascóp.
The pupils looked at the alga under the microscope.
Bhí an t-uisce clúdaithe le halgaí.
The water was covered with algae.
Is cineál alga í an fheamainn.
Seaweed is a kind of alga.
Tá a lán algaí san uisce te seo.
There are a lot of algae in this warm water.
Rinne sí staidéar ar fhás algaí i loch.
She studied the growth of algae in a lake.

Other nouns in Irish

More everyday Irish nouns to learn next.

Alga in Irish: frequently asked questions

What is the Irish for alga?

The Irish for alga is alga (pronounced “AL-uh-guh”). It’s a masculine noun and the plural is algaí.

How do you pronounce alga in Irish?

Alga is said like “AL-uh-guh” (IPA /ˈal̪ˠəɡə/).

What is the plural of alga in Irish?

The plural of alga is algaí; with the article, na halgaí means “the algae”. The genitive plural is algaí, as in fás na n-algaí (the growth of the algae).

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

Irish nouns beginning with a vowel take a prefix after certain words: an t-alga (the alga), a halga (her alga), a n-alga (their alga), na halgaí (the algae).

Is 'alga' the same as 'feamainn'?

No. 'Feamainn' means seaweed specifically, while 'alga' is the scientific term covering all algae, including tiny ones in ponds.

Learn Irish by
actually speaking it

Learn everyday Irish words like alga through guided conversation with Rua.

7-day free trial. Cancel anytime.

The HeyRua app home screen