Oa-OqOr-OsOt-Oz
OOa-Oq
- Oath of Maimonides
- OB
- OB/GYN
- Obese
- Obesity
- Obesity, exogenous
- Objective
- OBS
- Observer variation
- Obsessive-compulsive disorder
- Obstetrician
- Obstetrics
- Obstruction
- Obtunded
- Occam's razor
- Occipital
- Occipital bone
- Occipital hematoma
- Occlude
- Occult
- Occupational therapist
- OCG
- OCP
- Ocular
- OD (lens prescription)
- Odynophagia
- Offspring
- Ointment
- Oligo- (prefix)
- Oligohydramnios
- Oligospermia
- Oliguria
- oma
- Omega-3 fatty acids
- Omentum
- OMS
- OMS (World Health Organization)
- On call
- Oncologist
- Oncology
- Ondine's curse
- Oneirophrenia
- Onset
- Onycho- (prefix)
- Onychocryptosis
- Onychomycosis
- Oocyte
- Oogenesis
- Open-angle glaucoma
- Operation
- Ophthalmic
- Ophthalmitis
- Ophthalmoscope
- Ophthalmoscopy
- Opiate
- Opioid
- Opium
- Optometrist
OOr-Os
- OR (abbreviation)
- Oral
- Oral cholecystogram
- Oral contraceptive
- Oral glucose tolerance test
- Oral moniliasis
- Oral rehydration salts
- Orbit
- Orbital
- ORF
- Organ
- Organ failure
- Organic
- Organic brain syndrome
- Orgasm
- Oriental medicine (traditional)
- Ornithine transcarbamylase (OTC) deficiency
- Orphan disease
- Ortho- (prefix)
- Orthodontic treatment (dental braces)
- Orthopedist
- Orthopod
- Orthoscopic
- Orthostatic hypotension
- Orthotic
- Os
- OS (lens prescription)
- Oscitation
- OSHA
- Osmolar
- Osmolarity
- Osmole
- Osseous
- Ossification
- Osteitis
- Osteitis deformans
- Osteo- (prefix)
- Osteoarthritis
- Osteoarthropathy
- Osteoblast
- Osteochondroma
- Osteoclasia
- Osteoclasis
- Osteodystrophy
- Osteogenesis
- Osteogenesis imperfecta
- Osteolytic
- Osteomalacia
- Osteopathy
- Osteopetrosis
- Osteoporosis
- Osteosynthesis
- Ostomy
OOt-Oz
- Ot-
- OTC (over-the-counter)
- Othello syndrome
- Otitis media
- Oto-
- Otolaryngology
- Ototoxicity
- Ounce
- Ova
- Ovarian cyst
- Ovarian teratoma
- Ovary
- Over-the-counter (OTC) drug
- Overactive bladder
- Overweight
- Ovulation
- Oxter
- Oxy
- Oxycodone
- OxyContin
- Oxygen
- Oxygen tent
- Oxygenation
- Oxyhemoglobin
- Oxymetholone
- Oxytocin
- oz.