ⓘ O (Cyrillic)

                                     

ⓘ O (Cyrillic)

O is a letter of the Cyrillic script.

O commonly represents the close-mid back rounded vowel /o, like the pronunciation of ⟨o⟩ in Scottish English "go".

                                     

1. History

The Cyrillic letter O was derived from the Greek letter Omicron Ο ο.

The name of O in the Early Cyrillic alphabet was онъ onŭ, meaning "he" or "it".

In the Cyrillic numeral system, O had a value of 70.

                                     

2.1. Form Modern fonts

In modern-style typefaces, the Cyrillic letter O looks exactly like the Latin letter ⟨O o⟩ and the Greek letter Omicron ⟨Ο ο⟩.

                                     

3. Usage

In Russian, O is used word-initially, after another vowel, and after non-palatalized consonants. Because of a vowel reduction processes, the Russian /o/ phoneme may have a number of pronunciations in unstressed syllables, including.

In Macedonian the letter represents the sound /ɔ/.

In Tuvan the Cyrillic letter can be written as a double vowel.

                                     

4. Related letters and other similar characters

  • Ο ο: Greek letter Omicron
  • Ҩ ҩ: Cyrillic letter O-hook
  • Ѻ ѻ: Cyrillic letter Broad On
  • Ё ё: Cyrillic letter Yo
  • O o: Latin letter O
  • Ӧ ӧ: Cyrillic letter O with diaeresis
  • Ө ө: Cyrillic letter Oe
  • Ӫ ӫ: Cyrillic letter Oe with diaeresis
                                     

5. Computing codes

Exotic glyph variants of Cyrillic O are available only in Unicode:

  • CYRILLIC SMALL LETTER ROUND OMEGA: U+047B
  • CYRILLIC CAPITAL LETTER ROUND OMEGA: U+047A
  • broad Ѻ/ѻ
  • CYRILLIC SMALL LETTER UK: U+0479 deprecated in favor of combination of Cyrillic letters о and у, U+043E U+0443 or U+1C82 U+0443
  • CYRILLIC SMALL LETTER NARROW O: U+1C82
  • CYRILLIC CAPITAL LETTER UK: U+0478 deprecated in favor of combination of Cyrillic letters О and у, U+041E U+0443
  • narrow ᲂ does not just represent itself, but also used in digraph Oy/oy
  • CYRILLIC SMALL LETTER CROSSED O: U+A69B
  • with a cross inside Ꚛ/ꚛ
  • CYRILLIC CAPITAL LETTER CROSSED O: U+A69A
  • doubled Ꚙ/ꚙ
  • CYRILLIC CAPITAL LETTER DOUBLE O: U+A698
  • CYRILLIC SMALL LETTER DOUBLE O: U+A699
  • CYRILLIC SMALL LETTER MONOCULAR O: U+A669
  • eyed Ꙩ/ꙩ
  • CYRILLIC CAPITAL LETTER MONOCULAR O: U+A668
  • two-eyed Ꙫ/ꙫ, Ꙭ/ꙭ
  • CYRILLIC CAPITAL LETTER BINOCULAR O: U+A66A
  • CYRILLIC CAPITAL LETTER DOUBLE MONOCULAR O: U+A66C
  • CYRILLIC SMALL LETTER BINOCULAR O: U+A66B
  • CYRILLIC SMALL LETTER DOUBLE MONOCULAR O: U+A66D
  • many-eyed ꙮ
  • CYRILLIC LETTER MULTIOCULAR O: U+A66E
  • COMBINING CYRILLIC LETTER O: 2DEA
  • combining O for Church Slavonic abbreviations as трⷪца = троица Holy Trinity)