In November 2021, a COVID-19 variant was named Omicron, after the 15th letter of the Greek alphabet. The World Health Organization uses Greek letters to name variants, because these names are easier to communicate than scientific designations like B.1.617.2. According to the WHO, the 13th and 14th Greek letters (nu and xi) were skipped over because "nu" sounds like "new," and "xi" is also a common surname.
The pronunciation of omicron has several variant forms acceptable in standard English. In American English, the primary stress is usually on the first syllable, pronounced as either a short \o\ as \ˈä-mə-ˌkrän\ or a long \o\ as \ˈō-mə-ˌkrän\. In British English, the primary stress can also be heard on the second syllable: \ō-ˈmī-(ˌ)krän\.
See also: omicron
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