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Molecule in Irish (Móilín): Meaning, Pronunciation, Usage

The Irish for molecule is móilín, a masculine noun (plural móilíní).
Updated October 2026Report a mistake

How to say “molecule” in Irish

Irish:
móilín
English:
molecule
Word type:
noun
Gender:
masculine, fourth declension
Pronunciation:
“MOH-leen”  /ˈmoːlʲiːnʲ/
Various forms
Plural:
móilíní (molecules)
Genitive singular:
móilín, an mhóilín (e.g. struchtúr an mhóilín, structure of the molecule)
Genitive plural:
móilíní, na móilíní (e.g. gluaiseacht na móilíní, the movement of the molecules)

What does “móilín” mean?

molecule
The smallest unit of a chemical substance, made up of two or more atoms joined together.Also: molecular unit, particle.

“Móilín” with the article

The plural of molecule in Irish is móilíní. Here is móilín after the article (an t-alt), in the singular and the plural.

an móilín
the molecule
No change after an
na móilíní
the molecules
Plural: no change after na

“Móilín” in a sentence: Irish examples

Common Irish sentences using móilín, the Irish word for molecule.

Is móilín é uisce atá déanta as trí adamh.
Water is a molecule made of three atoms.
Tá dhá adamh hidrigine sa mhóilín seo.
There are two hydrogen atoms in this molecule.
Tharraing an múinteoir pictiúr den mhóilín ar an gclár.
The teacher drew a picture of the molecule on the board.
Bogann na móilíní níos tapúla nuair a théann sé te.
The molecules move faster when it gets hot.
Rinneamar samhail de mhóilín DNA ar scoil.
We made a model of a DNA molecule at school.
Cad é méid an mhóilín sin?
What is the size of that molecule?
Tá na milliúin móilíní i mbraon amháin uisce.
There are millions of molecules in a single drop of water.

Other nouns in Irish

More everyday Irish nouns to learn next.

Molecule in Irish: frequently asked questions

What is the Irish for molecule?

The Irish for molecule is móilín (pronounced “MOH-leen”). It’s a masculine noun and the plural is móilíní.

How do you pronounce móilín in Irish?

Móilín is said like “MOH-leen” (IPA /ˈmoːlʲiːnʲ/).

What is the plural of molecule in Irish?

The plural of móilín is móilíní; with the article, na móilíní means “the molecules”. The genitive plural is móilíní, as in gluaiseacht na móilíní (the movement of the molecules).

Why does móilín change to mhóilín?

After words like mo (my) and do (your) the first letter is lenited: mo mhóilín. After ár (our) it stays ár móilín, because m does not take eclipsis.

What is the difference between 'móilín' and 'adamh'?

An 'adamh' is an atom, a single unit of an element, while a 'móilín' is a molecule made of atoms bonded together.

What is the Irish adjective for 'molecular'?

The adjective is 'móilíneach', as in 'bitheolaíocht mhóilíneach' for molecular biology.

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