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Biology in Irish (Bitheolaíocht): Meaning, Pronunciation, Usage

The Irish for biology is bitheolaíocht, a feminine noun.
Updated October 2026Report a mistake

How to say “biology” in Irish

Irish:
bitheolaíocht
English:
biology
Word type:
noun
Gender:
feminine, third declension
Pronunciation:
“BI-hoh-lee-ukht”  /ˈbʲɪhoːl̪ˠiːxt̪ˠ/
Various forms
Genitive singular:
bitheolaíochta, na bitheolaíochta (e.g. múinteoir bitheolaíochta, biology teacher)

What does “bitheolaíocht” mean?

biology
The science that studies living things such as plants, animals and people.Also: life science, biological science.

“Bitheolaíocht” with the article

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

an bhitheolaíocht
the biology
Lenition: b becomes bh after an (feminine noun)

“Bitheolaíocht” in a sentence: Irish examples

Common Irish sentences using bitheolaíocht, the Irish word for biology.

Is aoibhinn liom bitheolaíocht ar scoil.
I love biology at school.
Tá an bhitheolaíocht deacair i mbliana.
Biology is hard this year.
Tá scrúdú bitheolaíochta againn amárach.
We have a biology exam tomorrow.
Rinne mo dheirfiúr céim sa bhitheolaíocht.
My sister did a degree in biology.
Is í an bhitheolaíocht an t-ábhar is fearr liom.
Biology is my favourite subject.
Chaill mé mo leabhar bitheolaíochta inné.
I lost my biology book yesterday.
Tá suim mhór aige i mbitheolaíocht na mara.
He is very interested in marine biology.

Other nouns in Irish

More everyday Irish nouns to learn next.

Biology in Irish: frequently asked questions

What is the Irish for biology?

The Irish for biology is bitheolaíocht (pronounced “BI-hoh-lee-ukht”). It’s a feminine noun.

How do you pronounce bitheolaíocht in Irish?

Bitheolaíocht is said like “BI-hoh-lee-ukht” (IPA /ˈbʲɪhoːl̪ˠiːxt̪ˠ/).

Does bitheolaíocht have a plural?

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

Why does bitheolaíocht change to bhitheolaíocht or mbitheolaíocht?

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

What is a biologist in Irish?

A biologist is 'bitheolaí', from the same root as 'bitheolaíocht'.

How do I say 'biology class'?

Use the genitive: 'rang bitheolaíochta'.

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