XO
English
Alternative forms
- (extra old): X.O., X.O, X. O.
- (executive officer): X.O., X. O.
Adjective
XO (not comparable)
Coordinate terms
- CO (commanding officer)
- 1O (first officer)
- 2O (second officer)
- 3O (third officer)
- 4O (fourth officer)
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