noun
omicron
O-mihk-ron
noun
1
The 15th letter of the Greek alphabet.
"The professor wrote omicron on the board to distinguish it from omega."
2
Used as a label in scientific naming, such as for a variant of a virus.
"The Omicron variant spread rapidly across the globe in late 2021."
How to Use Omicron
Learner’s notesIn plain EnglishA Greek letter, also used as a label for the 15th item in a numbered scientific series (like virus variants).
Easily confused with
Word Forms
omicrons plural, omicra plural
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The professor wrote _____ on the board to distinguish it from omega.
Etymology
From Greek "o mikron," meaning "little o," as opposed to the "big o" of omega.