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Quadrant in Irish (Ceathramhán): Meaning, Pronunciation, Usage

The Irish for quadrant is ceathramhán, a masculine noun (plural ceathramháin).
Updated October 2026Report a mistake

How to say “quadrant” in Irish

Irish:
ceathramhán
English:
quadrant
Word type:
noun
Gender:
masculine, first declension
Pronunciation:
“KYA-roo-awn”  /ˈcaɾˠuːaːnˠ/
Various forms
Plural:
ceathramháin (quadrants)
Genitive singular:
ceathramháin, an cheathramháin (e.g. ga an cheathramháin, radius of the quadrant)
Genitive plural:
ceathramhán, na gceathramhán (e.g. airíonna na gceathramhán, the properties of the quadrants)

What does “ceathramhán” mean?

quadrant
A quarter of a circle, or an instrument shaped like one used for measuring angles and altitudes.Also: quarter circle, quadrant instrument.

“Ceathramhán” with the article

The plural of quadrant in Irish is ceathramháin. Here is ceathramhán after the article (an t-alt), in the singular and the plural.

an ceathramhán
the quadrant
No change after an
na ceathramháin
the quadrants
Plural: no change after na

“Ceathramhán” in a sentence: Irish examples

Common Irish sentences using ceathramhán, the Irish word for quadrant.

Is ceathrú cuid de chiorcal é ceathramhán.
A quadrant is a quarter of a circle.
Tarraing an ceathramhán ar an bpáipéar.
Draw the quadrant on the paper.
Tá an pointe sa cheathramhán uachtarach ar dheis.
The point is in the upper right quadrant.
Roinn an graf ina cheithre cheathramhán.
Divide the graph into four quadrants.
Thomhais sé achar an cheathramháin.
He measured the area of the quadrant.
D'úsáid na mairnéalaigh ceathramhán chun an ghrian a thomhas.
The sailors used a quadrant to measure the sun.
Cén ceathramhán ina bhfuil an líne?
Which quadrant is the line in?

Other nouns in Irish

More everyday Irish nouns to learn next.

Quadrant in Irish: frequently asked questions

What is the Irish for quadrant?

The Irish for quadrant is ceathramhán (pronounced “KYA-roo-awn”). It’s a masculine noun and the plural is ceathramháin.

How do you pronounce ceathramhán in Irish?

Ceathramhán is said like “KYA-roo-awn” (IPA /ˈcaɾˠuːaːnˠ/).

What is the plural of quadrant in Irish?

The plural of ceathramhán is ceathramháin; with the article, na ceathramháin means “the quadrants”. The genitive plural is ceathramhán, as in airíonna na gceathramhán (the properties of the quadrants).

Why does ceathramhán change to cheathramhán or gceathramhán?

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

How is 'ceathramhán' different from 'ceathrú'?

'Ceathrú' is the general word for a quarter of anything, while 'ceathramhán' is the technical term for a quadrant, a quarter circle or the measuring instrument.

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