Etymology · Koine Greek
ὂ μῑκρόν
1 English words descend from Koine Greek ὂ μῑκρόν, most common first.
- omicronThe 15th letter of the Classical and Modern Greek alphabets (16th in Ancient and Old Greek), used in ordering lists as in naming (astronomy) the 15th star of a constellation or (epidemiology) the 15th discovered major variant of a disease.