U

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U
ISO basic Latin alphabet
Aa Bb Cc Dd Ee Ff Gg
Hh Ii Jj Kk Ll Mm Nn
Oo Pp Qq Rr Ss Tt Uu
Vv Ww Xx Yy Zz
Cursive.svg
Circle sheer blue 29.gif
Circle sheer blue 29.gif
Cursive script 'u' and capital 'U'

U (named u /ˈjuː/, plural ues[1][2]) is the twenty-first letter in the ISO basic Latin alphabet and a vowel in the English alphabet.

History[edit]

The letter u ultimately comes from the Semitic letter Waw by way of the letter y. See the letter y for details.

During the late Middle Ages, two forms of 'v' developed, which were both used for its ancestor 'u' and modern 'v'. The pointed form 'v' was written at the beginning of a word, while a rounded form 'u' was used in the middle or end, regardless of sound. So whereas 'valor' and 'excuse' appeared as in modern printing, 'have' and 'upon' were printed 'haue' and 'vpon'. The first distinction between the letters 'u' and 'v' is recorded in a Gothic alphabet from 1386, where 'v' preceded 'u'. By the mid-16th century, the 'v' form was used to represent the consonant and 'u' the vowel sound, giving us the modern letter 'u'. Capital 'U' was not accepted as a distinct letter until many years later.[3]

Use in English[edit]

In English the letter is pronounced differently in different words. As an English vowel letter, it has a "long" and "short" pronunciation that are used in different contexts. Short 'u', found in closed syllables, commonly represents /ʌ/ (as in 'duck') or /ʊ/ (as in 'put'). Long 'u' commonly represents /juː/ ("long U" as in 'mule') or // (as in 'blue').

Additionally, the letter 'u' is used in text messaging and internet and other written slang to denote 'you', by virtue of both being pronounced /juː/.

Use in other languages[edit]

In most languages that use the Latin alphabet, 'U' represents the close back rounded vowel /u/[citation needed].

In French orthography the letter represents the close front rounded vowel; /u/ is represented by 'ou'.

In mathematics and science[edit]

The symbol 'U' is the chemical symbol for uranium.

'u' is the symbol for the atomic mass unit.

U is also the source of the mathematical symbol ∪, representing a union. It is used mainly for Venn diagrams and geometry.

It is also used as a graphic approximation of the Greek letter μ (mu) for micro- in metric measurements, as in "um" for μm (micrometer).

Related letters and other similar characters[edit]

Computing codes[edit]

Character U u
Unicode name LATIN CAPITAL LETTER U     LATIN SMALL LETTER U
Encodings decimal hex decimal hex
Unicode 85 U+0055 117 U+0075
UTF-8 85 55 117 75
Numeric character reference U U u u
EBCDIC family 228 E4 164 A4
ASCII 1 85 55 117 75
1 Also for encodings based on ASCII, including the DOS, Windows, ISO-8859 and Macintosh families of encodings.

Other representations[edit]

NATO phonetic Morse code
Uniform ··–
ICS Uniform.svg Semaphore Uniform.svg ⠥
Signal flag Flag semaphore Braille
dots-136

References[edit]

  1. ^ "U", Oxford English Dictionary, 2nd edition (1989); Merriam-Webster's Third New International Dictionary of the English Language, Unabridged (1993)
  2. ^ Brown & Kiddle (1870) The institutes of English grammar, page 19.
    Ues is the plural of the name of the letter; the plural of the letter itself is rendered U's, Us, u's, or us.
  3. ^ Pflughaupt, Laurent (2008). Letter by Letter: An Alphabetical Miscellany. trans. Gregory Bruhn. Princeton Architectural Press. pp. 123–124. ISBN 978-1-56898-737-8. Retrieved 2009-06-21. 

External links[edit]

  • Media related to U at Wikimedia Commons
  • The dictionary definition of U at Wiktionary
  • The dictionary definition of u at Wiktionary


Aa Bb Cc Dd Ee Ff Gg Hh Ii Jj Kk Ll Mm Nn Oo Pp Qq Rr Ss Tt Uu Vv Ww Xx Yy Zz
Letter U with diacritics
Úú Ùù Ŭŭ Ûû Ǔǔ Ůů Üü Ǘǘ Ǜǜ Ǚǚ Ǖǖ Űű Ũũ Ṹṹ Ųų Ūū Ṻṻ Ủủ Ȕȕ Ȗȗ Ưư Ứứ Ừừ Ữữ Ửử Ựự
Ụụ Ṳṳ Ṷṷ Ṵṵ Ʉʉ
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