O

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.