- D.O.
- D.O. (Doctor of Optometry) doctor who practices and performs examinations of the eyes to diagnose visual defects and prescribes corrective lenses or other forms of treatment D.O. (Doctor of Osteopathy) doctor who practices medicine and surgery that emphasizes the interrelationship of the muscles and bones to all other body systems; doctor who treats and heals bone disease, osteopathic physician
English contemporary dictionary. 2014.