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Serum in Irish (Séiream): Meaning, Pronunciation, Usage

The Irish for serum is séiream, a masculine noun (plural séirim).
Updated October 2026Report a mistake

How to say “serum” in Irish

Irish:
séiream
English:
serum
Word type:
noun
Gender:
masculine, first declension
Pronunciation:
“SHAY-rum”  /ˈʃeːɾʲəmˠ/
Various forms
Plural:
séirim (serums)
Genitive singular:
séirim, an tséirim (e.g. instealladh séirim, an injection of serum)
Genitive plural:
séiream, na séiream (e.g. úsáid na séiream, the use of sera)

What does “séiream” mean?

serum
The clear watery part of blood, or a preparation made from it that is used to treat or prevent disease.Also: blood serum, antiserum, antitoxin.

“Séiream” with the article

The plural of serum in Irish is séirim. Here is séiream after the article (an t-alt), in the singular and the plural.

an séiream
the serum
No change after an
na séirim
the serums
Plural: no change after na

“Séiream” in a sentence: Irish examples

Common Irish sentences using séiream, the Irish word for serum.

Tugadh séiream don othar san ospidéal.
The patient was given serum in the hospital.
Tá an séiream á choimeád sa chuisneoir.
The serum is being kept in the fridge.
Bhí buidéal beag séirim ar an mbord.
There was a small bottle of serum on the table.
Déantar séirim áirithe as fuil capall.
Certain sera are made from horse blood.
Scrúdaigh an dochtúir an séiream go cúramach.
The doctor examined the serum carefully.
Tá frithsubstaintí i séiream na fola.
There are antibodies in blood serum.
Ní raibh go leor séirim acu sa chlinic.
They did not have enough serum in the clinic.

Other nouns in Irish

More everyday Irish nouns to learn next.

Serum in Irish: frequently asked questions

What is the Irish for serum?

The Irish for serum is séiream (pronounced “SHAY-rum”). It’s a masculine noun and the plural is séirim.

How do you pronounce séiream in Irish?

Séiream is said like “SHAY-rum” (IPA /ˈʃeːɾʲəmˠ/).

What is the plural of serum in Irish?

The plural of séiream is séirim; with the article, na séirim means “the serums”. The genitive plural is séiream, as in úsáid na séiream (the use of sera).

Why does séiream change to shéiream?

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

Is 'séiream' the same as 'vacsaín'?

No. 'Séiream' is serum, often containing ready-made antibodies, while 'vacsaín' is a vaccine that prompts the body to make its own immunity.

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