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Biologist in Irish (Bitheolaí): Meaning, Pronunciation, Usage

The Irish for biologist is bitheolaí, a masculine noun (plural bitheolaithe).
Updated October 2026Report a mistake

How to say “biologist” in Irish

Irish:
bitheolaí
English:
biologist
Word type:
noun
Gender:
masculine, fourth declension
Pronunciation:
“BI-hyoh-lee”  /ˈbʲɪhoːl̪ˠiː/
Various forms
Plural:
bitheolaithe (biologists)
Genitive singular:
bitheolaí, an bhitheolaí (e.g. tuairim an bhitheolaí, the biologist's opinion)
Genitive plural:
bitheolaithe, na mbitheolaithe (e.g. cumann na mbitheolaithe, the society of the biologists)

What does “bitheolaí” mean?

biologist
A scientist who studies living things and how they live and grow.Also: biology scientist, life scientist.

“Bitheolaí” with the article

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

an bitheolaí
the biologist
No change after an
na bitheolaithe
the biologists
Plural: no change after na

“Bitheolaí” in a sentence: Irish examples

Common Irish sentences using bitheolaí, the Irish word for biologist.

Is bitheolaí í mo dheirfiúr.
My sister is a biologist.
Labhair an bitheolaí faoi éin na farraige.
The biologist talked about seabirds.
Léigh mé alt an bhitheolaí inné.
I read the biologist's article yesterday.
Tá bitheolaithe ag obair ar an oileán.
Biologists are working on the island.
Ba mhaith liom a bheith i mo bhitheolaí.
I would like to be a biologist.
Tháinig na bitheolaithe ar speiceas nua.
The biologists discovered a new species.
Bhí bitheolaí mara ar an mbád linn.
There was a marine biologist on the boat with us.

Other nouns in Irish

More everyday Irish nouns to learn next.

Biologist in Irish: frequently asked questions

What is the Irish for biologist?

The Irish for biologist is bitheolaí (pronounced “BI-hyoh-lee”). It’s a masculine noun and the plural is bitheolaithe.

How do you pronounce bitheolaí in Irish?

Bitheolaí is said like “BI-hyoh-lee” (IPA /ˈbʲɪhoːl̪ˠiː/).

What is the plural of biologist in Irish?

The plural of bitheolaí is bitheolaithe; with the article, na bitheolaithe means “the biologists”. The genitive plural is bitheolaithe, as in cumann na mbitheolaithe (the society of the biologists).

Why does bitheolaí change to bhitheolaí or mbitheolaí?

Irish changes the start of some words after certain words. After mo (my) bitheolaí becomes mo bhitheolaí (lenition), and after ár (our) or i (in) it becomes ár mbitheolaí (eclipsis).

What is the word for the subject a biologist studies?

The subject is 'bitheolaíocht' (biology), and the person is 'bitheolaí'.

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