Medical terms beginning with O

• -oma
• -opathy
• ORT
• OTC drug
• Oedipus complex
• Osgood–Schlatter disease
• Oat cell carcinoma
• Obesity
• Obsessive–compulsive disorder
• Obstetrics
• Obstructive airways disease
• Occiput
• Occlusion
• Occult
• Occult blood, faecal
• Occupational disease and injury
• Occupational medicine
• Occupational mortality
• Occupational therapy
• Octreotide
• Ocular
• Oculogyric crisis
• Oculomotor nerve
• Oedema
• Oesophageal atresia
• Oesophageal dilatation
• Oesophageal diverticulum
• Oesophageal spasm
• Oesophageal speech
• Oesophageal stricture
• Oesophageal varices
• Oesophagitis
• Oesophagogastroduodenoscopy
• Oesophagogastroscopy
• Oesophagoscopy
• Oesophagus
• Oesophagus, cancer of
• Oesophagus, disorders of
• Oestradiol
• Oestriol
• Oestrogen drugs
• Oestrogen hormones
• Oestrone
• Ofloxacin
• Oils
• Ointment
• Olanzapine
• Olecranon
• Olfactory nerve
• Oligo-