noun
- the 15th letter of the Greek alphabet (O, o).
- the vowel sound represented by this letter.
noun
- the 15th letter in the Greek alphabet (Ο, ο), a short vowel, transliterated as o
15th letter of the Greek alphabet, literally “small ‘o,’ ” from Greek (s)mikros “small,” from PIE *smik-. Because the vowel was “short” in ancient Greek. Cf. Omega. n.
- The 15th letter of the Greek alphabet.