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Dictionary of Medical Acronyms & Abbreviations
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[ O ]
- OPTN organ procurement and transplant network
- OPUS Orbofiban in Patients with Unstable Coronary Syndromes [study]
- OPV oral polio vaccine; ovine papillomavirus
- OPV 1, 2 ovine papillomaviruses 1, 2
- OPWL opiate withdrawal
- OQAQ Overview Quality Assessment Questionnaire
- OR a logical binary relation that is true if any argument is true, and false otherwise; [o]estrogen receptor; odds ratio; oil retention [enema]; oligomer of resveratrol; open reduction; operating room; optic radiation; oral rehydration; orbicularis oris [muscle]; orosomucoid; orthopedic; orthopedic research; ouabain-resistant; outwardly rectifying [current]; oxidized radical
- O-R oxidation-reduction
- OR rate of outflow
- Or orbitale
- ORA opiate receptor agonist
- ORACLE Overview of the Role of Antibiotics in Curtailing Labor and Early Delivery [trial]
- ORALABX oral antibiotics
- ORANS Oak Ridge Analytical System
- ORB object request broker
- ORBIT Oral Glycoprotein IIb/IIIa Receptor Blockade to Inhibit Thrombosis [trial]
- ORBC ox red blood cell
- ORC oculo-reno-cerebellar [syndrome]; origin recognition complex
- ORCA open record for care
- orch orchitis
- ORCHIDS Office Records Charts Information Data System
- ORCl outwardly rectifying chloride current
- ORD optical rotatory dispersion; oral radiation death
- ORDS Office of Research, Demonstration, and Statistics
- ORE oil retention enema
- OREF Orthopedic Research and Education Foundation
- ORESTES open reading expressed sequence tags
- ORF open reading frame
- OR&F open reduction and fixation
- orf open reading frame
- ORFV orf virus
- Org, org organic
- ORGM organism [UMLS]
- ORH order header
- ORI Office of Research Integrity [NIH]
- ORIA Office of Radiation and Indoor Air
- ORIF open reduction with internal fixation
- ORIS ophthalmic retrobulbar injection simulator
- oriT origin of transfer
- ORIV Oriboca virus
- OrJ orange juice
- ORL otorhinolaryngology
- ORLS Oxford Record Linkage Study
- ORM object relational mapping; Office of Research and Methodology; orosomucoid; other regulated material; oxygen ratio monitor
- ORMC oxygen ratio monitor controller
- ORN olfactory receptor neuron; operating room nurse; orthopedic nurse
- Orn ornithine
- ORNL Oak Ridge National Laboratory
- ORO oil red O
- ORO observed odds ratio
- OROS oral osmotic
- OROV Oropouche virus
- ORUV 1, 2, 3, 4 Orungo viruses 1, 2, 3, 4
- ORP operating room personnel; oxidation-reduction potential
- ORPM orthorhythmic pacemaker
- ORR objective response rate
- ORS olfactory reference syndrome; oral rehydration solution; oral surgery, oral surgeon; Orthopaedic Research Society; orthopedic surgeon, orthopedic surgery; oxygen radical scavengers
- ORSA osteoclast resorption stimulating activity; oxacillin-resistant Staphylococcus aureus
- ORT object relations technique; operating room technician; oral rehydration therapy
- ORT true odds ratio
- orth, ortho orthopedics, orthopedic
- ORW Osler-Rendu-Weber [syndrome]
- ORXV Oriximina virus
- ORYX outcome research yields excellence
- OS left eye [Lat. oculus sinister]; object oriented; occipitosacral; occupational safety; office surgery; oligosaccharide; Omenn syndrome; opening snap; open source; open splenectomy; operating system; Opitz syndrome; oral surgery; ordinal scale; organ-specific; orthognathic surgery; orthopedic surgeon, orthopedic surgery; Osgood-Schlatter [disease]; osteogenic sarcoma; osteosarcoma; osteosclerosis; ouabain sensitivity; overall survival; oxygen saturation
- Os osmium
- OSA obstructive sleep apnea; Office of Services to the Aging; Optical Society of America; ovarian sectional area
- OSACA Osaka Follow-Up Study for Ultrasonographic Assessment of Carotid Atherosclerosis
- OSAI organism-specific antibody index
- OSAS obstructive sleep apnea syndrome
- OSBP oxysterol binding protein
- OSC on-scene coordinator
- osc oscillation
- OSCAR Olive Oil, Safflower Oil, Canola Oil and Rapeseed Oil [dietary study]; online survey, certification and reporting system
- OSCC oral squamous cell carcinoma
- OSCE objective structured clinical examination
- OS-CS osteopathia striata-cranial sclerosis [syndrome]
- OSDAT Oslo Study Diet and Antismoking Trial
- OS-EM ordered-subsequent expectation maximization
- OSF open software foundation; organ system failure; osteoclast-stimulating factor; outer spiral fiber; overgrowth stimulating factor
- OSF/DCE open software foundation/distributed computing environment
- OSG Office of the Surgeon General
- OSGi open services gateway initiative
- OSHA Occupational Safety and Health Administration
- OSH Act Occupational Safety and Health Act of 1970
- OsHV ostreid herpesvirus
- OSI open systems interconnection [reference model]
- OSIRIS Open Study of Infants at High Risk or with Respiratory Insufficiency: the Role of Surfactants; Optimization Study of Infarct Reperfusion Investigated by ST-Monitoring
- OSLER objectively structured long examination record
- OSM ovine submaxillary mucin; oxygen saturation meter
- Osm osmosis, osmolarity
- osm osmole; osmosis, osmotic
- OSMED otospondylometaphyseal dysplasia
- Osm/kg osmoles per kilogram
- Osm/L osmoles per liter
- osmol osmole
- OSMT Ontario Society of Medical Technologists
- O-SP O-specific polysaccharide
- OspA outer surface protein A
- OSQL object structure query language
- OSRC osteosarcoma
- OSRD Office of Scientific Research and Development
- OSS osseous; over-the-shoulder strap
- oss osseous
- OSSAV Ossa virus
- OST object sorting test; Office of Science and Technology; Ottawa Stroke Trial
- osteo osteoarthritis; osteomyelitis; osteopathy
- OSTI Optimal Stent Implantation [trial]
- OSTP Office of Science and Technology Policy
- OSUK Ophthalmological Society of the United Kingdom
- OSV observable state variable
- OT objective test; oblique talus; occlusion time; occupational therapist, occupational therapy; ocular tension; office therapy; old term (in anatomy); old tuberculin; olfactory threshold; on treatment; optic tract; orientation test; original tuberculin; ornithine transcarbamylase; orotracheal; orthopedic treatment; otolaryngology; otology; oxytocin; oxytryptamine
- Ot otolaryngology
- OTA ochratoxin A; occupational therapy assistant; Office of Technology Assessment; ornithine transaminase; orthotoluidine arsenite
- OTC ornithine transcarbamylase; oval target cell; ovarian tissue culture; over-the-counter; oxytetracycline
- OTCD ornithine carbamoyltransferase deficiency
- OTD oculotrichodysplasia; oral temperature device; organ tolerance dose
- OTE optically transparent electrode
- OTF octamer-binding transcription factor; optical transfer function; oral transfer factor; outpatient treatment file [database]
- OTFC oral transmucosal fentanyl citrate
- OTI ovomucoid trypsin inhibitor
- OTM orthotoluidine manganese sulfate
- OTO otology; otorhinolaryngology
- Otol otology, otologist
- OTPS other than personal services
- OTR Ovarian Tumor Registry; Occupational Therapist, Registered
- OTReg Occupational Therapist, Registered
- OTS n-octadecyltrichlorosilane; occipital temporal sulcus; optical tracking system; orotracheal suction
- OTSG Office of the Surgeon General
- OTSMD Ornithine Transcarbamoylase Structure and Mutation Database
- OTT orotracheal tube
- OTU olfactory tubercle; operational taxonomic unit
- OTW over the wire
- OTZ oxathiozolidine
- OU observation unit; Oppenheimer-Urbach [syndrome]
- ou both eyes together [Lat. oculi unitas]
- OUAV Ouango virus
- OUB ouabain
- OUBIV Oubi virus
- OUBR ouabain resistance
- OULQ outer upper left quadrant
- OUME operative unit of medical herpetology
- OUR oxygen uptake rate
- OURQ outer upper right quadrant
- OURS Oxford University Research Study; oxygen utilization rate study
- OURV Ourem virus
- OUS overuse syndrome
- OUTCLAS Outpatient Coronary Low-profile Angioplasty Study
- OUTI other urinary tract infections
- OV oculovestibular; office visit; oncovirus; osteoid volume; outflow volume; ovalbumin; ovary; overventilation; ovulation
- Ov ovary
- ov ovum
- OVA ovalbumin
- ova ovariectomy
- OVC ovarian cancer
- OVD occlusal vertical dimension; ophthalmological viscosurgical device
- OvDF ovarian dysfunction
- OvHV ovine herpesvirus
- OVLT organum vasculosum of the lamina terminalis
- OVRV Oak-Vale virus
- OVSF orthogonal variable spreading factor [telemedicine]
- OVSMC ovine vascular smooth muscle cell
- OVX ovariectomized
- OW outcome washing; once weekly; open wedge; outer wall; oval window; overweight
- O/W, o/w oil in water
- OWCL Old World cutaneous leishmaniasis
- OWI Office of Worksite Initiatives
- OW/O overweight and obesity
- o/w/o oil in water/oil
- OWR Osler-Weber-Rendu [syndrome]; ovarian wedge resection
- OWS outerwear syndrome
- OX optic chiasma; oxacillin; oxalate; oxide; orthopedic examination; oxytocin
- Ox oxygen
- ox oxidized
- OXA oxaprotiline
- OXCHECK Oxford and Collaborators Health Check [trial]
- OXIPHOS oxidative phosphorylation
- OxLDL, Ox-LDL oxidized low-density lipoprotein
- OXMIS Oxford Myocardial Infarction Incidence Study
- Oxo oxanosine
- 8oxoA 8-oxoadenine
- 8oxoG 8-oxoguanine
- OXP oxypressin
- OXPHOS oxidative phosphorylation
- OXT oxytocin
- OXTR oxytocin receptor
- OXY oxytocin
- OXY, oxy oxygen
- OYE old yellow enzyme
- OYS Oslo Youth study
- oz ounce
- oz ap, oz apoth apothecaries' ounce (US)
- oz t, oz tr troy ounce (UK)