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Physicist in Irish (Fisiceoir): Meaning, Pronunciation, Usage

The Irish for physicist is fisiceoir, a masculine noun (plural fisiceoirí).
Updated October 2026Report a mistake

How to say “physicist” in Irish

Irish:
fisiceoir
English:
physicist
Word type:
noun
Gender:
masculine, third declension
Pronunciation:
“FISH-ik-yohr”  /ˈfʲɪʃɪcoːɾʲ/
Various forms
Plural:
fisiceoirí (physicists)
Genitive singular:
fisiceora, an fhisiceora (e.g. obair an fhisiceora, the physicist's work)
Genitive plural:
fisiceoirí, na bhfisiceoirí (e.g. comhdháil na bhfisiceoirí, the physicists' conference)

What does “fisiceoir” mean?

physicist
A scientist who studies physics, the science of matter, energy and forces.Also: physics scientist, scientist.

“Fisiceoir” with the article

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

an fisiceoir
the physicist
No change after an
na fisiceoirí
the physicists
Plural: no change after na

“Fisiceoir” in a sentence: Irish examples

Common Irish sentences using fisiceoir, the Irish word for physicist.

Is fisiceoir í mo dheirfiúr.
My sister is a physicist.
Bhí an fisiceoir ag caint faoi fhuinneamh.
The physicist was talking about energy.
Léigh mé leabhar an fhisiceora sin.
I read that physicist's book.
Oibríonn go leor fisiceoirí i CERN.
Many physicists work at CERN.
Ba mhaith liom a bheith i m'fhisiceoir.
I would like to be a physicist.
Bhuaigh fisiceoir Éireannach duais mhór.
An Irish physicist won a big prize.
Tá na fisiceoirí ag déanamh turgnaimh nua.
The physicists are doing a new experiment.

Other nouns in Irish

More everyday Irish nouns to learn next.

Physicist in Irish: frequently asked questions

What is the Irish for physicist?

The Irish for physicist is fisiceoir (pronounced “FISH-ik-yohr”). It’s a masculine noun and the plural is fisiceoirí.

How do you pronounce fisiceoir in Irish?

Fisiceoir is said like “FISH-ik-yohr” (IPA /ˈfʲɪʃɪcoːɾʲ/).

What is the plural of physicist in Irish?

The plural of fisiceoir is fisiceoirí; with the article, na fisiceoirí means “the physicists”. The genitive plural is fisiceoirí, as in comhdháil na bhfisiceoirí (the physicists' conference).

Why does fisiceoir change to fhisiceoir or bhfisiceoir?

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

What is the difference between 'fisiceoir' and 'fisic'?

'Fisic' is the subject, physics, while 'fisiceoir' is the person who studies it, a physicist.

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