O

Latin alphabet
	A	B	C	D
E	F	G	H	I	J
K	L	M	N	O	P
Q	R	S	T	U	V
	W	X	Y	Z

O is the fifteenth letter of the Latin alphabet.

In Greek (Omikron), Etruscan and Latin O stood for the vowel /o/. Although Semitic 'Ajin was used in some alphabets to transcribe [o], the sound value was usually consonantic: [?/] (as the Arabic letter ع called 'Ajn').

Oscar represents the letter O in the NATO phonetic alphabet.

Meanings for O

in baseball, The Baltimore Orioles are sometimes simply referred to as the "Os".
In calendars, O is often the abbreviation for the month October.
In chemistry, O is the symbol for oxygen.
In computer science, O means order, as used in computational complexity theory and mathematics to describe the size of functions using a notation called Big O notation.
in film, O is the name of a 2001 film based on William Shakespeare's Othello starring Mekhi Phifer and Josh Hartnett, set in a high school. The duke is the basketball coach nicknamed "Duke", and the Othello role is a basketball star nicknamed "O". The movie is a portrayal of how adolescent jealousy can get out of hand, leading to deadly consequences.
in financial securities, O is the stock symbol for Realty Income Corporation.
in French, O is a homophone of eau (water)
in literature, O is the subject of the sadomasochistic novel The Story of O
In mathematics, blackboard bold represents the octonions
in medicine, O is one of the human blood types.
in publishing O is the name of a major magazine founded and edited by entrepreneur Oprah Winfrey; see O (magazine) .
in theater, "O" is the name of a Cirque du Soleil show in Las Vegas, which is a theatrical acrobatic production set in a water stage.
In wine, O is the name of several châteaux in France, e.g. Château d'O in Normandy [1]

See also: º, Ò, Ó, Ô, Ŏ, Õ, Ö (Oe), Ø, Œ (OE), Ő

Two-letter combinations starting with O:

oa ob oc od oe of og oh oi oj ok ol om on oo op oq or os ot ou ov ow ox oy oz