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Orbital in Irish (Fithiseán): Meaning, Pronunciation, Usage

The Irish for orbital is fithiseán, a masculine noun (plural fithiseáin).
Updated October 2026Report a mistake

How to say “orbital” in Irish

Irish:
fithiseán
English:
orbital
Word type:
noun
Gender:
masculine
Pronunciation:
“FIH-ish-awn”  /ˈfʲɪhəʃaːnˠ/
Various forms
Plural:
fithiseáin (orbitals)
Genitive singular:
fithiseáin, an fhithiseáin (e.g. cruth an fhithiseáin, the shape of the orbital)
Genitive plural:
fithiseán, na bhfithiseán (e.g. cruth na bhfithiseán, the shape of the orbitals)

What does “fithiseán” mean?

orbital
In chemistry and physics, a region around an atomic nucleus where an electron is likely to be found.Also: atomic orbital, electron orbital.

“Fithiseán” with the article

The plural of orbital in Irish is fithiseáin. Here is fithiseán after the article (an t-alt), in the singular and the plural.

an fithiseán
the orbital
No change after an
na fithiseáin
the orbitals
Plural: no change after na

“Fithiseán” in a sentence: Irish examples

Common Irish sentences using fithiseán, the Irish word for orbital.

Is fithiseán é an réigiún sin timpeall an núicléis.
That region around the nucleus is an orbital.
Tá dhá leictreon san fhithiseán seo.
There are two electrons in this orbital.
Tá cruth sféarach ar an bhfithiseán s.
The s orbital has a spherical shape.
Tá trí fhithiseán p sa dara blaosc.
There are three p orbitals in the second shell.
Líon an leictreon an fithiseán leis an bhfuinneamh is ísle.
The electron filled the lowest energy orbital.
Míníonn an múinteoir fuinneamh an fhithiseáin dúinn.
The teacher explains the orbital's energy to us.
Tarraing léaráid de na fithiseáin i do chóipleabhar.
Draw a diagram of the orbitals in your copybook.

Other nouns in Irish

More everyday Irish nouns to learn next.

Orbital in Irish: frequently asked questions

What is the Irish for orbital?

The Irish for orbital is fithiseán (pronounced “FIH-ish-awn”). It’s a masculine noun and the plural is fithiseáin.

How do you pronounce fithiseán in Irish?

Fithiseán is said like “FIH-ish-awn” (IPA /ˈfʲɪhəʃaːnˠ/).

What is the plural of orbital in Irish?

The plural of fithiseán is fithiseáin; with the article, na fithiseáin means “the orbitals”. The genitive plural is fithiseán, as in cruth na bhfithiseán (the shape of the orbitals).

Why does fithiseán change to fhithiseán or bhfithiseán?

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

How is 'fithiseán' different from 'fithis'?

'Fithis' means an orbit, such as a planet's path around the sun, while 'fithiseán' is the chemistry term for an electron orbital in an atom.

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