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Definition of omicron noun from the Oxford Advanced Learner's Dictionary

omicron

noun
 
/ˈɒmɪkrɒn/,
 
/əʊˈmaɪkrɒn/
 
/ˈɑːməkrɑːn/,
 
/ˈəʊməkrɑːn/
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  1. [countable] the 15th letter of the Greek alphabet (O, o)
  2. Omicron
     [uncountable] a variant (= form) of the SARS-CoV-2 virus that was first reported in November 2021 and spread quickly to become the main form of the virus in many places
    • These new measures are intended to slow the spread of Omicron.
    compare DeltaTopics Health problemsc2
    3. Word Originfrom Greek o mikron ‘small o’.
See omicron in the Oxford Advanced American Dictionary
Check pronunciation: omicron

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