From Academic Kids

Template:AZO is the fifteenth letter of the Latin alphabet.



The letter was derived from the Semitic 'Ajin (eye) which represented a consonant, probably the pharyngeal consonant (IPA ) similar to the Arabic letter ع called 'Ajn', but in Greek (Omicron), Etruscan and Latin it came to be used for the vowel .


O is most commonly associated with the [[close-mid back rounded vowel|]]. In English, though, O has a short value which maps to [[Open back rounded vowel|]] ([[Open back unrounded vowel|]] in parts of North America), while the long value tends to a diphthong of [[Close-mid back rounded vowel|]] and [[Near-close near-back rounded vowel|]]. Common digraphs include OO (inconsistently with the sound [[Near-close near-back rounded vowel|]] or [[Close back rounded vowel|]]), OI (usually a diphthong of [[Open-mid back rounded vowel|]] and [[Close front unrounded vowel|]]), as well as OA, OE, and OU with a variety of pronunciations depending on context.

Other languages use O for various values, usually back vowels which are at least partly open. Derived letters such as Ö and Ø have been created by some languages to distinguish values that were not present in Latin and Greek, particularly rounded front vowels.

Alternative representations

Oscar represents the letter O in the NATO phonetic alphabet. In the International phonetic alphabet, [o] represents the close-mid back rounded vowel.

Meanings for O

In medicine, O (also, O+ or O-) is one of the human blood types.

In chemistry, O stands for oxygen.

In Normandy, O is a well-known and picturesque château. See Château d'O.

O is also a symbol for a hug, as in love notes. (See Hugs and Kisses.)

O is also the nickname of a magazine founded by Oprah Winfrey, more formally called O, The Oprah Magazine.

O may refer to the 2002 album by Damien Rice, see O (album).

O is also a movie.

O is a family name in Japanese; see O (name).

Story of O is a French erotic novel.

In economics, O is usually used to represent output.

In Windows, Ctrl-O, and Mac OS, Command-O, opens a file.

"O" is the name of a production show by Cirque du Soleil at the Bellagio (hotel and casino) in Las Vegas.

Big O notation is, in mathematics and computer science, used to describe the asymptotic behavior of a function or algorithm.

See also

Template:AZsubnavaf:O bs:O ca:O cs:O da:O de:O el:O es:O eo:O fr:O gl:O ia:O it:O la:O nl:O ja:O ko:O nb:O nn:O pl:O pt:O ro:O simple:O sl:O fi:O sv:O vi:O yo:O zh:O sn:O


Academic Kids Menu

  • Art and Cultures
    • Art (http://www.academickids.com/encyclopedia/index.php/Art)
    • Architecture (http://www.academickids.com/encyclopedia/index.php/Architecture)
    • Cultures (http://www.academickids.com/encyclopedia/index.php/Cultures)
    • Music (http://www.academickids.com/encyclopedia/index.php/Music)
    • Musical Instruments (http://academickids.com/encyclopedia/index.php/List_of_musical_instruments)
  • Biographies (http://www.academickids.com/encyclopedia/index.php/Biographies)
  • Clipart (http://www.academickids.com/encyclopedia/index.php/Clipart)
  • Geography (http://www.academickids.com/encyclopedia/index.php/Geography)
    • Countries of the World (http://www.academickids.com/encyclopedia/index.php/Countries)
    • Maps (http://www.academickids.com/encyclopedia/index.php/Maps)
    • Flags (http://www.academickids.com/encyclopedia/index.php/Flags)
    • Continents (http://www.academickids.com/encyclopedia/index.php/Continents)
  • History (http://www.academickids.com/encyclopedia/index.php/History)
    • Ancient Civilizations (http://www.academickids.com/encyclopedia/index.php/Ancient_Civilizations)
    • Industrial Revolution (http://www.academickids.com/encyclopedia/index.php/Industrial_Revolution)
    • Middle Ages (http://www.academickids.com/encyclopedia/index.php/Middle_Ages)
    • Prehistory (http://www.academickids.com/encyclopedia/index.php/Prehistory)
    • Renaissance (http://www.academickids.com/encyclopedia/index.php/Renaissance)
    • Timelines (http://www.academickids.com/encyclopedia/index.php/Timelines)
    • United States (http://www.academickids.com/encyclopedia/index.php/United_States)
    • Wars (http://www.academickids.com/encyclopedia/index.php/Wars)
    • World History (http://www.academickids.com/encyclopedia/index.php/History_of_the_world)
  • Human Body (http://www.academickids.com/encyclopedia/index.php/Human_Body)
  • Mathematics (http://www.academickids.com/encyclopedia/index.php/Mathematics)
  • Reference (http://www.academickids.com/encyclopedia/index.php/Reference)
  • Science (http://www.academickids.com/encyclopedia/index.php/Science)
    • Animals (http://www.academickids.com/encyclopedia/index.php/Animals)
    • Aviation (http://www.academickids.com/encyclopedia/index.php/Aviation)
    • Dinosaurs (http://www.academickids.com/encyclopedia/index.php/Dinosaurs)
    • Earth (http://www.academickids.com/encyclopedia/index.php/Earth)
    • Inventions (http://www.academickids.com/encyclopedia/index.php/Inventions)
    • Physical Science (http://www.academickids.com/encyclopedia/index.php/Physical_Science)
    • Plants (http://www.academickids.com/encyclopedia/index.php/Plants)
    • Scientists (http://www.academickids.com/encyclopedia/index.php/Scientists)
  • Social Studies (http://www.academickids.com/encyclopedia/index.php/Social_Studies)
    • Anthropology (http://www.academickids.com/encyclopedia/index.php/Anthropology)
    • Economics (http://www.academickids.com/encyclopedia/index.php/Economics)
    • Government (http://www.academickids.com/encyclopedia/index.php/Government)
    • Religion (http://www.academickids.com/encyclopedia/index.php/Religion)
    • Holidays (http://www.academickids.com/encyclopedia/index.php/Holidays)
  • Space and Astronomy
    • Solar System (http://www.academickids.com/encyclopedia/index.php/Solar_System)
    • Planets (http://www.academickids.com/encyclopedia/index.php/Planets)
  • Sports (http://www.academickids.com/encyclopedia/index.php/Sports)
  • Timelines (http://www.academickids.com/encyclopedia/index.php/Timelines)
  • Weather (http://www.academickids.com/encyclopedia/index.php/Weather)
  • US States (http://www.academickids.com/encyclopedia/index.php/US_States)


  • Home Page (http://academickids.com/encyclopedia/index.php)
  • Contact Us (http://www.academickids.com/encyclopedia/index.php/Contactus)

  • Clip Art (http://classroomclipart.com)
Personal tools