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Tetrahedron in Irish (Teitrihéadrán): Meaning, Pronunciation, Usage

The Irish for tetrahedron is teitrihéadrán, a masculine noun (plural teitrihéadráin).
Updated October 2026Report a mistake

How to say “tetrahedron” in Irish

Irish:
teitrihéadrán
English:
tetrahedron
Word type:
noun
Gender:
masculine
Pronunciation:
“tet-ree-HAY-draan”  /ˈtʲɛtʲɾʲiˌheːd̪ˠɾˠaːnˠ/
Various forms
Plural:
teitrihéadráin (tetrahedrons)
Genitive singular:
teitrihéadráin, an teitrihéadráin (e.g. aghaidheanna an teitrihéadráin, faces of the tetrahedron)
Genitive plural:
teitrihéadrán, na dteitrihéadrán (e.g. samhlacha teitrihéadrán, models of tetrahedrons)

What does “teitrihéadrán” mean?

tetrahedron
A solid shape with four triangular faces, such as a triangular pyramid.Also: triangular pyramid, four-faced solid.

“Teitrihéadrán” with the article

The plural of tetrahedron in Irish is teitrihéadráin. Here is teitrihéadrán after the article (an t-alt), in the singular and the plural.

an teitrihéadrán
the tetrahedron
No change after an
na teitrihéadráin
the tetrahedrons
Plural: no change after na

“Teitrihéadrán” in a sentence: Irish examples

Common Irish sentences using teitrihéadrán, the Irish word for tetrahedron.

Tá ceithre aghaidh ar theitrihéadrán.
A tetrahedron has four faces.
Rinne na páistí teitrihéadrán as cárta.
The children made a tetrahedron out of card.
Is triantán gach aghaidh den teitrihéadrán.
Every face of the tetrahedron is a triangle.
Ríomh toirt an teitrihéadráin.
Calculate the volume of the tetrahedron.
Tá sé imeall ag an teitrihéadrán.
The tetrahedron has six edges.
Chonaic mé teitrihéadráin sa leabhar matamaitice.
I saw tetrahedrons in the maths book.
Tá ceithre rinn i dteitrihéadrán.
There are four vertices in a tetrahedron.

Other nouns in Irish

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Tetrahedron in Irish: frequently asked questions

What is the Irish for tetrahedron?

The Irish for tetrahedron is teitrihéadrán (pronounced “tet-ree-HAY-draan”). It’s a masculine noun and the plural is teitrihéadráin.

How do you pronounce teitrihéadrán in Irish?

Teitrihéadrán is said like “tet-ree-HAY-draan” (IPA /ˈtʲɛtʲɾʲiˌheːd̪ˠɾˠaːnˠ/).

What is the plural of tetrahedron in Irish?

The plural of teitrihéadrán is teitrihéadráin; with the article, na teitrihéadráin means “the tetrahedrons”. The genitive plural is teitrihéadrán, as in samhlacha teitrihéadrán (models of tetrahedrons).

Why does teitrihéadrán change to theitrihéadrán or dteitrihéadrán?

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

Is a teitrihéadrán the same as a pirimid?

A teitrihéadrán is a pirimid with a triangular base; a square-based pirimid is not a teitrihéadrán.

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