The meaning of the Acronym XO is...

XO is

• Xanthine Oxidase

More Meanings For XO:

• Hug and Kiss
• Kisses and Hugs
• X'd Out
• Extra Old
• Xd Out
• X Over
• Xoops Object
• Xanthine Oxidase
• Executive Officer
• X-Axis of Orbiter
• Orbiter Structural Body Reference, X-Axis
• Executive Officer

XO is also in:

• Adults
• Chat
• Food
• Human Genome
• Military
• NASA
• Police
• SMS
• Unfiled