Advanced Search
Drug Medical Dictionary A-Z List - O
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
O →
Oa-Oc
Od-Om
On-Oq
Or-Or
Os-Os
Ot-Ow
Ox-Oz
Oa-Oc
OAE
Oat cell cancer
Oath of Maimonides
OB
OB/GYN
Obese
Obesity
Obesity, endogenous
Obesity, exogenous
Obesity, gynecoid
Obesity-related disease
Objective
OBS
Observer variation
Obsessive-compulsive disorder
Obsessive-compulsive personality disorder
Obstetrical forceps
Obstetrician
Obstetrician/gynecologist
Obstetrics
Obstruction
Obstruction, airway
Obstruction, intestinal
Obstructive sleep apnea
Obtund
Obtunded
Obverse
Occam's razor
Occipital
Occipital bone
Occipital hematoma
Occiput
Occlude
Occlusion
Occult
Occult stool blood test
Occupational disease
Occupational medicine
Occupational Safety and Health Administration
Occupational Safety and Health, Nat'l Institut for
Occupational therapist
OCD
Ocean itch
OCG
Ochronosis
OCP
OCPD
Octalene
Octalox
Octogenarian
Ocular
Ocular conjunctiva
Ocular histoplasmosis syndrome
Ocular melanoma
Ocular migraine
Ocular prosthesis
Oculo-auriculo-vertebral spectrum
Oculoauriculovertebral dysplasia
Oculocraniosomatic syndrome
Oculocutaneous albinism
Oculodentodigital dysplasia
Oculomotor nerve
Oculoplastics
Back to Top
↑
Od-Om
OD (lens prescription)
ODD syndrome
Odynophagia
Oesophagus
Off-label use
Off-pump
Off-pump CABG
Off-pump surgery
Office of Human Research Protections (OHRP)
Offspring
OGG1
OHRP
Oil, tropical
Ointment
Okihiro syndrome
OKT3
Olecranon
Olefaction
Olefactory
Olfaction
Olfactory
Olfactory apparatus
Olfactory bulb
Olfactory disorder
Olfactory nerve
Olfactory system
Oligo- (prefix)
Oligoarthritis
Oligoastrocytoma
Oligodactyly
Oligodendrocyte
Oligodendroglioma
Oligohydramnios
Oligomenorrhea
Oligonucleotide
Oligonucleotide probe
Oligopeptide
Oligospermia
Oliguria
Oliva
Olivae
Olivary
Olive
Olive oil diet
Oliver Wendell Holmes, Sr.
Olivo-
Olivopontocerebellar
Olivopontocerebellar atrophy
Ollier disease
oma
Omega-3 fatty acids
Omentectomy
Omentum
Ommaya reservoir
Omniscience
Omphalo-
Omphalocele
Omphalos
OMS
OMS (World Health Organization)
Back to Top
↑
On-Oq
On call
Onchocerciasis
Oncogene
Oncogene ErbB
Oncologist
Oncology
Ondine's curse
Oneiric
Oneirophrenia
Oneself, fear of
Onset
Onycho- (prefix)
Onychocryptosis
Onychodystrophy
Onychogryposis
Onycholysis
Onychomycosis
Onychomycosis, proximal white subungual
Onychoosteodysplasia
Oocyte
Oogenesis
Oogonium
Oophorectomy
Oophoritis
OPCA
Open charting
Open cholecystectomy
Open fracture
Open heart surgery
Open reading frame
Open wound
Open-angle glaucoma
Open-label
Open-label trial
Opening, vaginal
Operating room
Operation
Operation, Blalock-Taussig
Operation, Glenn
Operation, Macewen
Operon
Ophthalmia
Ophthalmic
Ophthalmic artery
Ophthalmic migraine
Ophthalmic veins
Ophthalmitis
Ophthalmologist
Ophthalmology
Ophthalmopathy
Ophthalmoplegia with myopathy
Ophthalmoplegia with ragged-red fibers
Ophthalmoplegia-plus syndrome
Ophthalmoscope
Ophthalmoscopy
Opiate
Opiate agonist maintenance
Opioid
Opisthotonos
Opium
Opportunistic condition
Opportunistic infection
Opportunistic microorganism
Optic
Optic cup
Optic disc
Optic glioma
Optic nerve
Optic nerve head
Optic nerve pathways
Optic neuroma
Optician
Optometrist
OPV
Back to Top
↑
Or-Or
OR (abbreviation)
Oral
Oral aversion
Oral cancer
Oral candidiasis
Oral cholecystogram
Oral contraceptive
Oral contraceptive, combined
Oral glucose tolerance test
Oral moniliasis
Oral rehydration salts
Oral rehydration therapy
Oral surgeon
Oral-motor
Orbit
Orbital
Orbital fracture
Orbital ridge
Orchiectomy
Orchiopexy
Orchitis
Ordre des Medecins
Ordre des Medecins
ORF
Organ
Organ failure
Organ of hearing
Organic
Organic brain syndrome
Organic dust toxic syndrome
Organisation Mondiale de la Sante
Organotherapy
Organs of reproduction, female
Organs of reproduction, male
Orgasm
Orgasmic disorder
Orgasmic dysfunction
Orgasmic inhibition
Oriental lung fluke
Oriental medicine (traditional)
Orientation, anatomic terms of
Orifice
Ornithine
Ornithine transcarbamylase (OTC) deficiency
Ornithophobia
Oromandibular dystonia
Oropharynx
Orphan disease
Orphan drug
ORS
Ortho- (prefix)
Orthodontic treatment (dental braces)
Orthodontics
Ortholog
Orthologous gene
Orthomolecular medicine
Orthopaedics
Orthopaedist
Orthopedics
Orthopedist
Orthopnea
Orthopod
Orthopox
Orthorexia nervosa
Orthoscopic
Orthosis, thoracolumbosacral (TLSO)
Orthostatic hypotension
Orthotic
Oryzomys palustris
Back to Top
↑
Os-Os
Os
OS (lens prescription)
Os calcis
Os sacrum
OSA (obstructive sleep apnea)
Oscillating vision
Oscillopsia
Oscitation
Osgood-Schlatter disease
OSHA
Osler's nodes
Osler, Sir William
Osler-Rendu-Weber syndrome
Osmolar
Osmolarity
Osmolarity, plasma
Osmole
Osseous
Ossicle
Ossification
Ossify
Osteitis
Osteitis deformans
Osteitis fibrosa cystica
Osteo- (prefix)
Osteoarthritis
Osteoarthropathy
Osteoblast
Osteoblastoma
Osteochondritis dissecans
Osteochondroma
Osteochondromatosis
Osteochondromatosis, synovial
Osteochondrosis
Osteoclasia
Osteoclasis
Osteoclast
Osteoclastoma
Osteocyte
Osteodystrophy
Osteodystrophy, renal
Osteogenesis
Osteogenesis imperfecta
Osteogenesis imperfecta congenita
Osteogenesis imperfecta tarda
Osteogenesis imperfecta type 1
Osteogenesis imperfecta type 2
Osteogenesis imperfecta with blue sclerae
Osteogenesis, electrically stimulated
Osteoid osteoma
Osteology
Osteolytic
Osteolytic lesion
Osteomalacia
Osteomyelitis
Osteonecrosis
Osteopath
Osteopathy
Osteopenia
Osteopetrosis
Osteoporosis
Osteosarcoma
Osteosynthesis
Osteotomy
Osteotomy, block
Osteotomy, cuneiform
Osteotomy, displacement
Ostomy
Oswald Theodore Avery
Back to Top
↑
Ot-Ow
Ot-
Otalgia
OTC (over-the-counter)
Othello psychosis
Othello syndrome
Otic barotrauma
Otitis
Otitis externa
Otitis interna
Otitis media
Otitis media, acute
Oto-
Otoacoustic emission test
Otolaryngologist
Otolaryngology
Otology
Otopharyngeal tube
Otoplasty
Otosclerosis
Otoscope
Ounce
Outer ear
Outlet
Outlet, gastric
Outpatient
Output, cardiac
Ova
Ovarian
Ovarian cancer
Ovarian cancer gene BRCA2
Ovarian cancer test CA 125
Ovarian cyst
Ovarian pregnancy
Ovarian remnant syndrome
Ovarian teratoma
Ovariectomy
Ovary
Ovary cyst, follicular
Ovary, dermoid cyst of the
Ovary, polycystic
Over-the-counter (OTC) drug
Overactive bladder
Overbreathing
Overgrowth
Overgrowth syndrome
Overload, iron
Overweight
Ovulation
Ovulatory
Ovum
Back to Top
↑
Ox-Oz
Oxter
Oxy
Oxycodone
OxyContin
Oxygen
Oxygen mask
Oxygen tent
Oxygenate
Oxygenating
Oxygenation
Oxyhemoglobin
Oxymetholone
Oxytocin
Oxyuris
oz.
Ozone
Drug Medical Dictionary A-Z List - O
A
B
C
D
E
F
G
H
I
J
K
L
M
N
O
P
Q
R
S
T
U
V
W
X
Y
Z
Privacy Policy
Women's Health
Find out what women really need.
From WebMD
Featured Centers
Top 10 Asthma Cities
Health Check: How to Choose The Right Vitamins
10 Triggers for the Holiday Blues
Health Solutions
From Our Sponsors
Fibromyalgia Treatment
Managing Depression
Male Urinary Problems
Featured Topics
Depression Tips Slideshow
Fibromyalgia Friendly Exercises Slideshow
New & Updated
Arzerra
Albenza
Daptacel
Votrient
Zetia
Health & Drug News
New Drug for
Shingles Pain
P&G Recalls
Sinex Nasal Spray
Drug May Boost Women's Sexual Desire
View More »
Search the Medical Dictionary for Health Definitions & Medical Abbreviations
Updated & New
News & Features
Identify Your Drugs:
Use the RxList Pill Identifier Tool