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Dinosaur in Irish (Dineasár): Meaning, Pronunciation, Usage

The Irish for dinosaur is dineasár, a masculine noun (plural dineasáir).
Updated October 2026Report a mistake

How to say “dinosaur” in Irish

Irish:
dineasár
English:
dinosaur
Word type:
noun
Gender:
masculine, first declension
Pronunciation:
“DIN-yuh-sawr”  /ˈdʲɪnʲəsˠɑːɾˠ/
Various forms
Plural:
dineasáir (dinosaurs)
Genitive singular:
dineasáir, an dineasáir (e.g. cnámha an dineasáir, the dinosaur's bones)
Genitive plural:
dineasár, na ndineasár (e.g. ré na ndineasár, the age of the dinosaurs)

What does “dineasár” mean?

dinosaur
A large prehistoric reptile that lived millions of years ago and is now extinct.Also: prehistoric reptile, extinct reptile.

“Dineasár” with the article

The plural of dinosaur in Irish is dineasáir. Here is dineasár after the article (an t-alt), in the singular and the plural.

an dineasár
the dinosaur
No change after an
na dineasáir
the dinosaurs
Plural: no change after na

“Dineasár” in a sentence: Irish examples

Common Irish sentences using dineasár, the Irish word for dinosaur.

Chonaic mé dineasár mór sa mhúsaem.
I saw a big dinosaur in the museum.
Bhí an dineasár níos airde ná an teach.
The dinosaur was taller than the house.
Is breá le mo mhac dineasáir.
My son loves dinosaurs.
Fuarthas cnámha an dineasáir sa ghaineamh.
The dinosaur's bones were found in the sand.
Fuair na dineasáir go léir bás fadó.
All the dinosaurs died long ago.
Léigh sí leabhar faoi dhineasáir inné.
She read a book about dinosaurs yesterday.
Tá mo dhineasár bréagáin briste.
My toy dinosaur is broken.

Other nouns in Irish

More everyday Irish nouns to learn next.

Dinosaur in Irish: frequently asked questions

What is the Irish for dinosaur?

The Irish for dinosaur is dineasár (pronounced “DIN-yuh-sawr”). It’s a masculine noun and the plural is dineasáir.

How do you pronounce dineasár in Irish?

Dineasár is said like “DIN-yuh-sawr” (IPA /ˈdʲɪnʲəsˠɑːɾˠ/).

What is the plural of dinosaur in Irish?

The plural of dineasár is dineasáir; with the article, na dineasáir means “the dinosaurs”. The genitive plural is dineasár, as in ré na ndineasár (the age of the dinosaurs).

Why does dineasár change to dhineasár or ndineasár?

Irish changes the start of some words after certain words. After mo (my) dineasár becomes mo dhineasár (lenition), and after ár (our) or i (in) it becomes ár ndineasár (eclipsis).

Is 'dineasár' used figuratively for an old-fashioned person, as in English?

Yes, informally you can call someone outdated a dineasár, just as in English, though it is mostly used for the animal.

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