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omicron

noun

om·​i·​cron ˈō-mə-ˌkrän How to pronounce omicron (audio) ˈä-mə-ˌkrän How to pronounce omicron (audio)
 British also  ō-ˈmī-(ˌ)krän
plural omicrons
1
: the 15th letter of the Greek alphabet see Alphabet Table
2
or less commonly Omicron : omicron variant
The speed of omicron's rise is quicker than the rise of previous variants of the virus, said Hannah Barbian, a Rush University Medical Center virologist who worked on the testing. Sarah Freishtat
How a Virus Got Its Name: Usage Guide

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.

How to Pronounce Omicron: Usage Guide

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\.

Example Sentences

Recent Examples on the Web The new boosters from Moderna and Pfizer-BioNTech target the highly contagious BA.5 omicron subvariant, as well as the original coronavirus strain. Erika Edwards, NBC News, 8 Sep. 2022 Any new variant that could change the pandemic's trajectory would have to be more transmissible than the omicron subvariant BA.5 currently circulating. Arkansas Online, 4 Sep. 2022 Any new variant that could change the pandemic’s trajectory would have to be more transmissible than the omicron subvariant BA.5 currently circulating. Joel Achenbach And Lena H. Sun, Anchorage Daily News, 3 Sep. 2022 Pfizer and German partner BioNTech have submitted their new COVID-19 booster – that targets the omicron subvariant BA.5 – to the FDA for emergency use authorization, the companies announced Monday. Adrianna Rodriguez, USA TODAY, 27 Aug. 2022 In late June, the FDA directed Moderna and Pfizer to make vaccines for the upcoming winter that targeted the more contagious BA.5 omicron subvariant, along with the original COVID strain. Cheyenne Haslett, ABC News, 16 Aug. 2022 Another recently identified omicron subvariant was shown to be more robust than other coronavirus strains, according to the results of a new study. Aidin Vaziri, San Francisco Chronicle, 11 Aug. 2022 According to health officials, the BA.5 omicron subvariant is fueling the ongoing surge. Scott D. Pierce, The Salt Lake Tribune, 11 Aug. 2022 This time, the contagious omicron subvariant BA.5 is causing a surge in cases and a return to universal masking inside schools. Olivia Krauth, The Courier-Journal, 9 Aug. 2022 See More

Word History

Etymology

Middle English, from Greek o mikron, literally, small o

First Known Use

1631, in the meaning defined at sense 1

Time Traveler
The first known use of omicron was in 1631

See also: omicron

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