omicron
/ˈɑmɪkrɑn/
noun
- The 15th letter of the Greek alphabet (Ο, ο).
- The Greek letter omicron looks similar to the English letter O.
- In the fraternity's name, omicron is the third letter.
- The teacher wrote omicron on the board during the Greek alphabet lesson.
- A highly contagious variant of the SARS-CoV-2 virus (COVID-19), first identified in late 2021.
- Many countries reinstated travel restrictions after omicron was detected.
- The omicron variant spread much faster than earlier strains of the virus.
- Vaccines were updated to better protect against omicron.