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Parasite in Irish (Seadán): Meaning, Pronunciation, Usage

The Irish for parasite is seadán, a masculine noun (plural seadáin).
Updated October 2026Report a mistake

How to say “parasite” in Irish

Irish:
seadán
English:
parasite
Word type:
noun
Gender:
masculine, first declension
Pronunciation:
“SHAD-awn”  /ˈʃad̪ˠɑːnˠ/
Various forms
Plural:
seadáin (parasites)
Genitive singular:
seadáin, an tseadáin (e.g. saolré an tseadáin, the life cycle of the parasite)
Genitive plural:
seadán, na seadán (e.g. saolré na seadán, the life cycle of the parasites)

What does “seadán” mean?

“Seadán” has two alternative meanings. The most common comes first.

parasite
An organism that lives on or in another living thing and feeds off it.Also: parasitic organism.
1 other meaning:
2parasite
A person who lives off other people without giving anything in return; a sponger.Also: sponger, freeloader, hanger-on.

“Seadán” with the article

The plural of parasite in Irish is seadáin. Here is seadán after the article (an t-alt), in the singular and the plural.

an seadán
the parasite
No change after an
na seadáin
the parasites
Plural: no change after na

“Seadán” in a sentence: Irish examples

Common Irish sentences using seadán, the Irish word for parasite.

Is seadán í an dreancaid.
The flea is a parasite.
Mhair an seadán i bputóg an ainmhí.
The parasite lived in the animal's gut.
Tá seadáin ar na caoirigh seo.
These sheep have parasites.
Rinne siad staidéar ar shaolré an tseadáin.
They studied the parasite's life cycle.
Is seadán ceart é, ní dhéanann sé lá oibre.
He's a real parasite, he never does a day's work.
Fuair an dochtúir seadán i mo chuid fola.
The doctor found a parasite in my blood.
Maraíonn an leigheas seo go leor seadán.
This treatment kills a lot of parasites.

Other nouns in Irish

More everyday Irish nouns to learn next.

Parasite in Irish: frequently asked questions

What is the Irish for parasite?

The Irish for parasite is seadán (pronounced “SHAD-awn”). It’s a masculine noun and the plural is seadáin.

How do you pronounce seadán in Irish?

Seadán is said like “SHAD-awn” (IPA /ˈʃad̪ˠɑːnˠ/).

What is the plural of parasite in Irish?

The plural of seadán is seadáin; with the article, na seadáin means “the parasites”. The genitive plural is seadán, as in saolré na seadán (the life cycle of the parasites).

Why does seadán change to sheadán?

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

Can 'seadán' describe a person?

Yes, as in English, 'seadán' can be used figuratively for someone who lives off others, e.g. 'Is seadán é'.

What is the adjective for parasitic?

The adjective is 'seadánach', as in 'planda seadánach' (a parasitic plant).

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