How do you pronounce "nucleus"?

In American English: /ˈnuːkliːəs/ (NOOKL-ee-uhs). In British English: /njˈuːklɪəs/ (NY-ookl-i). In Canadian English: /ˈnuːkliːəs/ (NOOKL-ee-uhs). In Australian English: /njˈuːklɪəs/ (NY-ookl-i).

Is "nucleus" pronounced differently in American and British English?

Yes. In American English it's pronounced /ˈnuːkliːəs/ (NOOKL-ee-uhs), while in British English it's /njˈuːklɪəs/ (NY-ookl-i).

How to Pronounce "nucleus"

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nucleus

regional

/ˈnuːkliːəs/

NOOKL-ee-uhs

Syllable Breakdown

nuːklnu·iːcle·əsus

Source

90%confidence📘 CMU Pronouncing Dictionary v0.7b

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Last updated: 2026-02-14