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Penicillin in Irish (Peinicillin): Meaning, Pronunciation, Usage

The Irish for penicillin is peinicillin, a feminine noun.
Updated October 2026Report a mistake

How to say “penicillin” in Irish

Irish:
peinicillin
English:
penicillin
Word type:
noun
Gender:
feminine, second declension
Pronunciation:
“PEN-ik-il-in”  /ˈpʲɛnʲɪcɪlʲɪnʲ/
Various forms
Genitive singular:
peinicilline, na peinicilline (e.g. cúrsa peinicilline, a course of penicillin)

What does “peinicillin” mean?

penicillin
An antibiotic medicine made from a mould, used to treat bacterial infections.Also: antibiotic.

“Peinicillin” with the article

Here is peinicillin after the article (an t-alt).

an pheinicillin
the penicillin
Lenition: p becomes ph after an (feminine noun)

“Peinicillin” in a sentence: Irish examples

Common Irish sentences using peinicillin, the Irish word for penicillin.

Thug an dochtúir peinicillin dom.
The doctor gave me penicillin.
Tá ailléirge agam le peinicillin.
I'm allergic to penicillin.
Fuair Alexander Fleming amach an pheinicillin.
Alexander Fleming discovered penicillin.
Chríochnaigh mé an cúrsa peinicilline inné.
I finished the course of penicillin yesterday.
Níor oibrigh an pheinicillin ar an ionfhabhtú.
The penicillin didn't work on the infection.
Tá peinicillin i go leor antaibheathach.
Penicillin is in many antibiotics.
Ar ghlac tú an pheinicillin ar maidin?
Did you take the penicillin this morning?

Other nouns in Irish

More everyday Irish nouns to learn next.

Penicillin in Irish: frequently asked questions

What is the Irish for penicillin?

The Irish for penicillin is peinicillin (pronounced “PEN-ik-il-in”). It’s a feminine noun.

How do you pronounce peinicillin in Irish?

Peinicillin is said like “PEN-ik-il-in” (IPA /ˈpʲɛnʲɪcɪlʲɪnʲ/).

Does peinicillin have a plural?

No plural form is given for peinicillin in the standard. Many abstract and mass nouns in Irish have no plural.

Why does peinicillin change to pheinicillin or bpeinicillin?

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

What is the general word for antibiotic in Irish?

An antibiotic is 'antaibheathach'; 'peinicillin' is one particular antibiotic.

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