How do you pronounce "penicillin"?

In American English: /ˌpɛnəˈsɪlən/ (pehn-uh-SIL-uhn). In British English: /pˌɛnɪsˈɪlɪn/ (p-ehn-IS-il). In Canadian English: /ˌpɛnəˈsɪlən/ (pehn-uh-SIL-uhn). In Australian English: /pˌɛnɪsˈɪlɪn/ (p-ehn-IS-il).

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

Yes. In American English it's pronounced /ˌpɛnəˈsɪlən/ (pehn-uh-SIL-uhn), while in British English it's /pˌɛnɪsˈɪlɪn/ (p-ehn-IS-il).

How to Pronounce "penicillin"

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penicillin

regional

/ˌpɛnəˈsɪlən/

pehn-uh-SIL-uhn

Syllable Breakdown

pɛnpe·əni·sɪlcil·ənlin

Source

80%confidence📘 CMU Pronouncing Dictionary v0.7b

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Last updated: 2026-02-14