U with macron is a letter of the Cyrillic alphabet

Cyrillic alphabet

The Cyrillic script or azbuka is an alphabetic writing system developed in the First Bulgarian Empire during the 10th century AD at the Preslav Literary School...

, derived from the Cyrillic letter U

U (Cyrillic)

U is a letter of the Cyrillic alphabet. It commonly represents the close back rounded vowel , somewhat like the pronunciation of ⟨oo⟩ in "boot"...

 (У у ).

U with macron is used in the alphabet of the Tajik language

Tajik language

Tajik, Tajik Persian, or Tajiki, is a variety of modern Persian spoken in Central Asia. Historically Tajiks called their language zabani farsī , meaning Persian language in English; the term zabani tajikī, or Tajik language, was introduced in the 20th century by the Soviets...

, where it represents the close-mid front rounded vowel

Close-mid front rounded vowel

The close-mid front rounded vowel, or high-mid front rounded vowel, is a type of vowel sound, used in some spoken languages. The symbol in the International Phonetic Alphabet that represents this sound is , a lowercase letter o with a diagonal stroke through it, derived from the Danish, Norwegian...

, /ø/. Accordingly, although the letter shape is a modification of ⟨У⟩, the only aspect of the sound shared with /u/ is that both are relatively close, rounded vowels.

In 1937, it was also proposed for use in the Karelian Cyrillic alphabet to represent /y/, but was not adopted.

U with macron is used to represent long /u/ in Kildin Sami and Mansi

Mansi

Mansi are an endangered indigenous people living in Khantia-Mansia, an autonomous okrug within Tyumen Oblast in Russia. In Khantia-Mansia, the Khanty and Mansi languages have co-official status with Russian....

, two Uralic languages spoken on the Kola peninsula

Kola Peninsula

The Kola Peninsula is a peninsula in the far northwest of Russia. Constituting the bulk of the territory of Murmansk Oblast, it lies almost completely to the north of the Arctic Circle and is washed by the Barents Sea in the north and the White Sea in the east and southeast...

 (Kildin) and Western Siberia

Siberia

Siberia is an extensive region constituting almost all of Northern Asia. Comprising the central and eastern portion of the Russian Federation, it was part of the Soviet Union from its beginning, as its predecessor states, the Tsardom of Russia and the Russian Empire, conquered it during the 16th...

 (Mansi). In these languages, length is distinctive, and macron is used to mark the long version of all the vowels.

Computing codes

character
Unicode name	CYRILLIC CAPITAL LETTER U WITH MACRON		CYRILLIC SMALL LETTER U WITH MACRON
character encoding	decimal	hex	decimal	hex
Unicode Unicode Unicode is a computing industry standard for the consistent encoding, representation and handling of text expressed in most of the world's writing systems...	1262	04EE	1263	04EF
UTF-8 UTF-8 UTF-8 is a multibyte character encoding for Unicode. Like UTF-16 and UTF-32, UTF-8 can represent every character in the Unicode character set. Unlike them, it is backward-compatible with ASCII and avoids the complications of endianness and byte order marks...	211 174	D3 AE	211 175	D3 AF
Numeric character reference Numeric character reference A numeric character reference is a common markup construct used in SGML and other SGML-related markup languages such as HTML and XML. It consists of a short sequence of characters that, in turn, represent a single character from the Universal Character Set of Unicode...	Ӯ	Ӯ	ӯ	ӯ

See also

• Ū ū : Latin letter U with macron
  U
  U is the twenty-first letter and a vowel in the basic modern Latin alphabet.-History:The letter U ultimately comes from the Semitic letter Waw by way of the letter Y. See the letter Y for details....
  
   - a Latvian and Lithuanian letter
• Ȳ ȳ : Latin letter Y with macron
  Y
  Y is the twenty-fifth letter in the basic modern Latin alphabet and represents either a vowel or a consonant in English.-Name:In Latin, Y was named Y Graeca "Greek Y". This was pronounced as I Graeca "Greek I", since Latin speakers had trouble pronouncing , which was not a native sound...
  
  - a similar looking character