The Greek Alphabet
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Greek Letter Omikron (Όμικρον - Ο)

"Micro" means "little" or "short", hence "little o". The throat and the lips are both rounded to make this sound, hence the shape.
"Ο" Letter in mathematics and in science
Ο represents:
- big O notation (may be represented by an uppercase Latin O as well)
Greek words with "ο"
όμορφο, πόλη
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