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Biological in Irish (bitheolaíoch): Meaning, Forms, Examples

The Irish for biological is bitheolaíoch: próiseas bitheolaíoch, a biological process.
Updated October 2026Report a mistake

How to say “biological” in Irish

Irish:
bitheolaíoch
English:
biological
Word type:
adjective
More biological:
níos bitheolaíche
Most biological:
is bitheolaíche
Plural:
bitheolaíocha
Pronunciation:
“bih-HYOH-lee-ukh”  /ˈbʲɪhoːliːəx/

What does “bitheolaíoch” mean?

biological
Relating to biology or to living things and their natural processes.Also: of biology, bio, organic.

“Bitheolaíoch” after a noun

An Irish adjective comes after its noun. Here is bitheolaíoch after próiseas (process, masculine), after eolaíocht (science, feminine) and after a plural.

after a masculine nounpróiseas bitheolaíocha biological process
after a feminine nouneolaíocht bhitheolaíocha biological science
after a plural nounpróisis bhitheolaíochabiological processes

séimhiú (the h) the ending

feminine
eolaíochtscience
+
bitheolaíochbiological
=
eolaíocht bhitheolaíocha biological science

After a feminine noun the adjective gets a séimhiú, an h after its first letter: eolaíocht bhitheolaíoch. After a masculine noun it stays as it is: próiseas bitheolaíoch.

plural
próisisprocesses
+
bitheolaíochabiological, plural
=
próisis bhitheolaíochabiological processes

With a plural noun the adjective takes its plural form, bitheolaíocha. It also gets an h after a plural that ends in a slender consonant: próisis bhitheolaíocha; after other plurals it does not: eolaíochtaí bitheolaíocha.

More biological, most biological, very biological

níosmore
+
bitheolaíchebiological
=
níos bitheolaíchemore biological
ismost
+
bitheolaíchebiological
=
is bitheolaíchemost biological

Tá an modh seo níos bitheolaíche ná an ceann eile. This method is more biological than the other one.

more biologicalníos bitheolaíchein the past tense: ní ba bhitheolaíche
most biologicalis bitheolaíchein the past tense: ba bhitheolaíche
as biological aschomh bitheolaíoch leno change after chomh
very biologicalan-bhitheolaíochan- lenites, except d, t and s
too biologicalróbhitheolaíochró- lenites

“Bitheolaíoch” in a sentence: Irish examples

With a masculine noun, a feminine noun, a plural, a comparison and on its own.

Is próiseas bitheolaíoch é an fás.
Growth is a biological process.
Is í a máthair bhitheolaíoch í.
She is her biological mother.
Rinne siad staidéar ar chórais bhitheolaíocha.
They studied biological systems.
Tá an modh seo níos bitheolaíche ná an ceann eile.
This method is more biological than the other one.
Tá an chúis bitheolaíoch, dar leis an dochtúir.
The cause is biological, according to the doctor.

Other adjectives in Irish

More everyday Irish adjectives to learn next.

Biological in Irish: frequently asked questions

What is the Irish for biological?

The Irish for biological is bitheolaíoch (pronounced “bih-HYOH-lee-ukh”). It comes after the noun: próiseas bitheolaíoch, a biological process; eolaíocht bhitheolaíoch, a biological science.

How do you say more biological and most biological in Irish?

níos bitheolaíche is more biological and is bitheolaíche is most biological. In the past tense they become ní ba bhitheolaíche and ba bhitheolaíche.

Why does bitheolaíoch become bhitheolaíoch?

After a feminine singular noun an adjective is lenited: it gets an h after its first letter. So eolaíocht bhitheolaíoch (a biological science) but próiseas bitheolaíoch (a biological process), because próiseas is masculine.

What is the plural of bitheolaíoch?

With a plural noun bitheolaíoch becomes bitheolaíocha: próisis bhitheolaíocha, eolaíochtaí bitheolaíocha. After a plural that ends in a slender consonant it is lenited as well.

How do you say very biological in Irish?

an-bhitheolaíoch. Too biological is róbhitheolaíoch, and as biological as is chomh bitheolaíoch le.

What is the noun related to 'bitheolaíoch'?

The noun is 'bitheolaíocht', meaning biology, and a biologist is 'bitheolaí'.

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