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Photosynthesis in Irish (Fótaisintéis): Meaning, Pronunciation, Usage

The Irish for photosynthesis is fótaisintéis, a feminine noun.
Updated October 2026Report a mistake

How to say “photosynthesis” in Irish

Irish:
fótaisintéis
English:
photosynthesis
Word type:
noun
Gender:
feminine
Pronunciation:
“FOH-tuh-shin-tyay-sh”  /ˈfoːt̪ˠəʃɪnʲˌtʲeːʃ/
Various forms
Genitive singular:
fótaisintéise, na fótaisintéise (e.g. próiseas na fótaisintéise, the process of photosynthesis)

What does “fótaisintéis” mean?

photosynthesis
The process by which green plants use sunlight to make food from carbon dioxide and water.Also: plant food production, light synthesis.

“Fótaisintéis” with the article

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

an fhótaisintéis
the photosynthesis
Lenition: f becomes fh after an (feminine noun)

“Fótaisintéis” in a sentence: Irish examples

Common Irish sentences using fótaisintéis, the Irish word for photosynthesis.

Foghlaimímid faoi fhótaisintéis sa rang eolaíochta.
We learn about photosynthesis in science class.
Tá solas na gréine riachtanach don fhótaisintéis.
Sunlight is essential for photosynthesis.
Táirgeann an fhótaisintéis ocsaigin.
Photosynthesis produces oxygen.
Tarlaíonn fótaisintéis i nduilleoga an phlanda.
Photosynthesis happens in the leaves of the plant.
Mhínigh an múinteoir próiseas na fótaisintéise dúinn.
The teacher explained the process of photosynthesis to us.
Bíonn clóraifill ag teastáil le haghaidh fótaisintéise.
Chlorophyll is needed for photosynthesis.
Ní féidir fótaisintéis a dhéanamh sa dorchadas.
Photosynthesis cannot take place in the dark.

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Photosynthesis in Irish: frequently asked questions

What is the Irish for photosynthesis?

The Irish for photosynthesis is fótaisintéis (pronounced “FOH-tuh-shin-tyay-sh”). It’s a feminine noun.

How do you pronounce fótaisintéis in Irish?

Fótaisintéis is said like “FOH-tuh-shin-tyay-sh” (IPA /ˈfoːt̪ˠəʃɪnʲˌtʲeːʃ/).

Does fótaisintéis have a plural?

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

Why does fótaisintéis change to fhótaisintéis or bhfótaisintéis?

Irish changes the start of some words after certain words. After mo (my) fótaisintéis becomes m'fhótaisintéis (lenition), and after ár (our) or i (in) it becomes ár bhfótaisintéis (eclipsis).

Why does 'fótaisintéis' become 'fhótaisintéis' after the article?

It is a feminine noun, so the article lenites it: 'an fhótaisintéis', though in the genitive the article does not lenite: 'na fótaisintéise'.

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