Medical terms beginning with O

• Oligodendroglioma
• Oligohydramnios
• Oligospermia
• Oliguria
• Olive oil
• Omentum
• Omeprazole
• Omphalocele
• Onchocerciasis
• Oncogenes
• Oncology
• Ondansetron
• Onychogryphosis
• Onycholysis
• Oophorectomy
• Open heart surgery
• Operable
• Operating theatre
• Operation
• Ophthalmia
• Ophthalmia neonatorum
• Ophthalmitis
• Ophthalmology
• Ophthalmoplegia
• Ophthalmoscope
• Ophthalmoscopy
• Opiate
• Opioid
• Opium
• Opportunistic infection
• Oppositional defiant disorder
• Optic atrophy
• Optic disc
• Optic nerve
• Optic neuritis
• Optician
• Optometry
• Oral
• Oral contraceptives
• Oral hygiene
• Oral rehydration therapy
• Oral surgery
• Oral syringe
• Orbit
• Orbital cellulitis
• Orchidectomy
• Orchidopexy
• Orchitis
• Orf
• Organ