O

letter of the Latin alphabet

The 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

O is the fifteenth (number 15) letter in the English alphabet and it has a shape of a circle.

Meanings for O

On calendars, O sometimes means the month October.
In chemistry, O is the symbol for oxygen.
In medicine, O is one of the human blood types.
Sometimes when saying decimals, O is another word for zero.

Other websites

The dictionary definition of o at Wiktionary
Media related to O at Wikimedia Commons

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