Here are the results for the letter o

o
none

o
none, without

o
none

o
none, without

o
none

o
none, without

O
objective

O
oedema

o
opening

o
oral

o
pint

o bifurcum
oesophagostomum bifurcum

o brumpti
oesophagostomum brumpti

o circumcincta
ostertagia circumcincta

O p-DDD
mitotane

O-R
oxidation-reduction

O.&A.
odontectomy and alveolectomy

O.D.
right eye

O.D.
right eye (Lat oculus dexter)

O.L.
left eye (Lat oculus sinister)

O.P.
outpatient

O.P.D.
outpatient department

O.S.
left eye

O.U.
both eyes

O/E
On Examination

o/p
oropharynx

O&E
observation and examination

o&p
ova & parasites

O&P
ova and parasite

O&P
ova and parasites

O&P
ova and parasites (stool exam)

O2
cap oxygen capacity

O2
Oxygen

O2
oxygen saturation

O2 cap
oxygen capacity

o3
ozone

oa
esophageal atresia

oa
obstructive apnea

oa
occipital artery

oa
occipitoanterior

OA
occiput anterior

oa
occupational asthma

oa
octanoic acid

oa
ocular albinism

oa
old age

oa
oleic acid

oa
optic atrophy

OA
organic acids

oa
orotic acid

OA
Osteoarthritis

oa
osteoarthrosis

oa
ovalbumin

oa
oxalic acid

oa1
x linked ocular albinism

OAA
oxaloacetic acid

oabp
organic anion binding protein

oac
oroantral communication

oad
obscure auditory dysfunction

oad
obstructive airway disease

oad
test battery for obscure auditory dysfunction

oae
oto acoustic emission test

oaf
oroantral fistula

oaf
osteoclast activating factor

oafns
oculoauriculofrontonasal syndrome

OAG
open angle glaucoma

oap
oncovin, ara c, prednisone

oap
osteoarthropathy

oap-bleo
oncovin, ara c, prednisone, bleomycin

OARG
Osteoporosis and Arthritis Research Group

OARS
Osteoarthritis Research Society

oasis
hcfa s outcome and assessment information set

OASIS
Outcome and Assessment Information Set

oat
ornithine oxo acid aminotransferase deficiency

OATA
Ohio Athletic Trainers Association

OATS
osteochondral autograft transfer system

oav dysplasia
oculoauriculovertebral dysplasia

oavs
oculoauriculovertebral spectrum

ob
esophageal biopsy

ob
obese

OB
OBG Obstetrics

ob
obliterative bronchiolitis

ob
obstetrician

OB
obstetrics

ob
occult bleeding

ob
occult blood

ob
olfactory bulb

ob
oligoclonal band

ob
overbite

OB/GYN
obstetrics and gynecology

OB/OJ ratio
overbite (OB) and horizontal overjet (OJ) ratio

OBJ
object; objective

obl
oblique

OBP
ova

obr
ortho bowel routine

OBRA
Omnibus Budget Reconciliation Act

obs
observation

OBS
observer

OBS
organic brain syndrome

obst
obstetrical

obstr
obstructive

OC
obsessive/compulsive

OC
obstetrical conjugate

oc
oleoresin capsicum

OC
on call

oc
only child

oc
onychocryptosis

oc
optic chiasma

oc
oral contraceptive

OC
oral contraceptive; office call

OC
oral contraceptives

oc
organ culture

oc
osteocalcin

oc
ovarian cancer

oca
oculocutaneous albinism

oca
oral contraceptive agent

oca
ovarian carcinoma

ocairs
occupational case analysis and interview rating scale

OCB
oligoclonal bands

occ
occasional

occ
occasionally

OCC
occiput

OCC
occupation

occip
occipital

occlus
occlusive

occr
ovarian cancer cluster region

occs
oculocerebrocutaneous syndrome

occup
occupational

ocd
obsessive compulsive disorder

OCD
obsessive-compulsive disorder

ocd
osteochondritis dissecans

OCD
osteochrondritis dissecans

OCE
comprehensive exam

OCE
observable cholinomimetic effects

OCE
odd-carbon fatty acid enriched

oCE
oligomeric carboxylesterases

OCE
oral conjugated estrogens

OCE
osteocartilaginous exostoses

OCEs
Oct-containing composite elements

OCF
occipital-frontal circumference

ocg
oral cholecystogram

OCG
oral cholecystography

ocl
oral colonic lavage

OCM
oculocephalic maneuver

ocp
oral contraceptive pill

OCP
Oral Contraceptive Pills

ocr
oculocephalic reflex

ocrl
lowe oculocerebrorenal syndrome

OCS
open canalicular system (about platelets)

oct
october

oct
ornithine carbamoyltransferase

OCT
Oxytocin Challenge Test

octor
on call to operating room

OD
(oculus dexter) right eye

OD
(oculus dexter) right eye

OD
(oculus dexter) right eye

od
occipital dysplasia

od
occupational disease

od
oculus dexter

OD
officer of the day

od
ollier disease

od
once daily

od
open drainage

OD
optic density

od
optic disc

od
optical density

OD
outer diameter

OD
overdose

ODA
on day of admission

odap
oxalyldiaminopropionic acid

odc
ornithine decarboxylase

odc
orotidylate decarboxylase

ODD
oppositional defiant disorder

odd dysplasia
oculodentodigital dysplasia

ODM
ophthalmodynamometry

ODN
oligodeoxynucleotide

odnp
octadecaneuropeptide

odpf
osseous dysplasia, digital, with facial pigmentary defects and multiple frenula

ODS
Oswestry Disability Score

odts
organic dust toxic syndrome

OE
on examination; orthopedic examination; otitis externa

OE
otitis externa

OECI
Organization of European Cancer Institutes

oed
oral epithelial dysplasia

oer
oxygen extraction ratio

OES
old English sheepdog

OET
oral endotracheal tube

oetx
oenanthotoxin

ofc
occipitofrontal circumference

OFC
orbitofrontal (head) circumference

ofd
orofacial digital syndrome

ofe
osteolysis, familial expansile

OFFA
Orthopaedic Foundation for Animals

ofg
orofacial granulomatosis

ofs
occasions for smoking scale

og
esophagogastrectomy

og
oligodendrocyte

og
onychogryphosis

og
orogastric

ogc
oxoglutarate carrier

OGE
USOffice of Government Ethics

ogs
opitz g syndrome

ogs
osteogenic sarcoma

ogtt
oral glucose tolerance test

oh
hydroxide

oh
hydroxycorticosteroid

oh
hydroxyl group

oh
hydroxyl radical

oh
obstetric history

oh
occupational health

oh
occupational history

OH
ocular health

oh
ohio

OH
overhang (dental restoration)

ohc
outer hair cell

ohd
organic heart disease

ohda
hydroxydopamine

ohe
oral health education

oher
office of health and environmental research

ohf
omsk hemorrhagic fever

ohi
oral hygiene instruction

ohl
oral hairy leukoplakia

ohm
onychomadesis

ohp
hydroxyprogesterone

ohrp
office of human research protection

OHS
open heart surgery

ohs
overhydrated hereditary stomatocytosis

oht
ocular hypertension

oi
opportunistic infection

oi
opportunistic infections

oi
osteogenesis imperfecta

OIA
optical immunoassay

oic
osteogenesis imperfecta congenita

OIF
Osteogenesis Imperfecta Foundation

OIG
Office of Inspector General

oirda
intermittent rhythmic delta activity

OIRDA
occiptal intermittent rhythmic delta activity

oit
osteogenesis imperfecta tarda

OJ
isoleucyl-tRNA synthetase

OJ
obstructive jaundice

oj
orange juice

OJ
Orthodontist Judgment

oj
overjet

OJ
overjet (type of maloclusion)

ok
odontogenic keratocyst

OKC
Open Kinetic Chain

okn
optieokinetic nystagmus

OKN
optokinetic nystagmus

okt10
ortho kung t10

okt11
ortho kung t11

okt3
ortho kung t3

okt4
ortho kung t4

okt6
ortho kung t6

okt8
ortho kung t8

OL
open label

olb
open lung biopsy

old
occupational lung disease

ole
object linking and embedding

oled
organic light emitting device

olp
oral lichen planus

OLSNA
Orthopaedic Laser Society of North America

olt
orthotopic liver transplant

olv
one lung ventilation

om
esophageal manometry

OM
obtuse marginal artery

om
occipitomental projection

om
occupational medicine

om
ocular movement

om
onychomycosis

om
osborne mendel rat

om
osteomalacia

om
osteopathic manipulation

OM
otitis media

omad
oncovin, methotrexate, adriamycin, dactinomycin

OMB
Office of Management and Budget

omc
open mitral commissurotomy

OMCTS
octamethylcyclotetrasiloxane

ome
otitis media with effusion

omi
old myocardial infarction

omim
online mendelian inheritance in man

omp
olfactory marker protein

omp
outer membrane protein

ompa
octamethyl pyrophosphoramide

ompa
otitis media, pharyngitis, adenitis

oms
organic mental syndrome

OMS
osteomyelosclerosis

omv
open mitral valvotomy

ON
optic nerve

on
optic neuritis

ONA
optic nerve atrophy

ONB
Olfactory Neuroblastoma

onc
oncology

ONDCP
Office of National Drug Control Policy

ONFH
osteonecrosis of the femoral head

ONH
optic nerve head

onh
optic nerve hypoplasia

onn
o nyong nyong fever

OO
osteoid osteoma

OOB
out of bed

ooh
out of hospital

oop
object oriented programming

OOP
out of plaster

oopla
object oriented programming language

oors
oculootoradial syndrome

op
esophageal pressure

op
occipitoposterior position

OP
occiput posterior

op
operative procedure

op
operator

op
opponens pollicis

op
orthostatic proteinuria

op
osmotic pressure

op
osteoporosis

OP
out patient

opa
oropharyngeal airway

opal
oncovin, prednisone, l asparaginase

OPC
oculopalatocerebral (syndrome)

opc
outpatient clinic

opca
olivopontocerebellar atrophy

OPCD
olivopontocerebellar degeneration

OPCOS
oligomenorrheic polycystic ovary syndrome

OPD
obstetric prediabetic

OPD
optical path difference

opd
otopalatodigital

OPD
otopalatodigital (syndrome)

OPD
outpatient dispensary

OPD
p-phetiylenediamine

OpDent
operative dentistry

OPDG
ocular plethysmodynamography

opem
ophthalmoplegia, external, and myopia

open
oncovin, prednisone, etoposide, novantrone

opg
ocular plethysmography

OPG
ocular pneumoplethysmography

OPG
orthopantomograin

OPG
osteoprotegerin

OPG
oxypolygelatin

OPH
obliterative pulmonary hypertension; ophthalmia

OPH
Oph ophthalmology; ophthalmoscopy

OPHC
Office of Prepaid Health Care

OphD
Doctor of Ophthalmology

ophi
occupational performance history interview

Ophth
ophthalmology

OPI
obliteration prediction index

OPI
oculoparalytic illusion; Omnibus Personality Inventory

OPI
opiates

OPI
osteoblastic proliferation index

OPI
overproduction inhibition

OPIDN
organophosphorus-induced delayed neuropathy

OPK
optokinetic

OPL
other party liability; outer plexiform layer; ovine placental lactogen

OPLL
ossification of posterior longitudinal ligament

OPM
occult primary malignancy; Office of Personnel Management; ophthalmoplegic migraine

opmd
oculopharyngeal muscular dystrophy

opn
operation

OPN
ophthalmic nurse; osteopontin

opns
operations

opo
organ procurement organization

opp
oncovin, procarbazine, prednisone

opp
opposite

OPP
osmotic pressure of plasma; oxygen partial pressure

oppa
oncovin, procarbazine, prednisone, adriamycin

OPPG
oculopneumoplethysmography

OPPS
Outpatient prospective payment system

OPRD
opiate receptor delta

OPRK
opiate receptor kappa

oprr
office of protection from res risks

OPRR
Office of Protection from Research Risks

OPRT
orotate pbosphoribosyltransferase

oprt
orotate phosphoribosyltransferase

OPS
operations; optical position sensor; osteoporosis-pseudolipoma syndrome; outpatient service; outpatient surgery

OPSA
ovarian papillary serous adenocarcinoma

OpScan
optical scanning

opsi
overwhelming post splenectomy infection

OPSI
overwhelming postsplenectomy infection

OPSR
Office of Professional Standards Review

opt
best (Lat Optimus); optics

opt
orthopantomogram

OPT
outpatient treatment

OPT
outpatient; outpatient treatment

opt.
best (Lat optimus)

OPT/NSC
outpatient treatment/nonservice connected

OPT/SC
outpatient treatment/service connected

OPTHD
optimal hemodialysis

opv
oral polio vaccine

OPV
oral poliovirus vaccine

OPWL
opiate withdrawal

OR
(o)estrogen receptor; odds ratio; oil retention (enema]; open reduction; operating room; optic radiation; oral rehydration; orosomucoid; orthopedic; orthopedic research

OR
(o)estrogen receptor; odds ratio; oil retention (enema]; open reduction; operating room; optic radiation; oral rehydration; orosomucoid; orthopedic; orthopedic research

OR
(o)estrogen receptor; odds ratio; oil retention (enema]; open reduction; operating room; optic radiation; oral rehydration; orosomucoid; orthopedic; orthopedic research

or
oestrogen receptors

or
oocyte retrieval

or
open reduction

OR
operating room

or
optic radiation

or
oral rehydration

Or
orbitale

OR
oriented

OR
rate of outflow

or-if
open reduction with internal fixation

OR-IF
ORIF open reduction with internal fixation

OR&F
open reduction and fixation; open reading frame

ORA
opiate receptor agonist

ORA
Orthopaedic Rehabilitation Association (AAOS Specialty Societies)

ORALABX
oral antibiotics

ORANS
Oak Ridge Analytical System

orb
object request broker

orbc
octadecyl rhodamine b chloride

ORBC
ox red blood cell

ORBD-NRC
Osteoporosis and Related Bone Diseases - National Resource Center

ORC
oculo-reno-cerebellar [syndrome]

Orcb
orchitis

ORD
optical rotatory dispersion; oral radiation death

ORDS
Office of Research and Statistics

ORE
oil retention enema

OREF
Orthopaedic Research and Education Foundation

orf
open reading frame

ORF
open reading frames

Org
org

ORIF
open reduction & internal fixation

orif
open reduction and internal fixation

ORIF
open reduction internal fixation

ORIF
open reduction with internal fixation (sample operative report)

ORJF
open reduction jaw fracture

ORM
orosomucoid; other regulated material; oxygen ratio monitor

ORMC
oxygen ratio monitor controller

ORN
operating room nurse; orthopedic nurse

orn
ornithine

ORNL
Oak Ridge National Laboratoiy

ornl
oak ridge national laboratory

ORO
oil red 0

OROS
oral osmotic

ORP
operating room personnel

ORP
oxidation-reduction potential

ORPM
orthorhythniic pacemaker

ORS
olfactory reference syndrome

ors
oral rehydration salts

ORS
oral rehydration solution

ORS
oral surgery

ORS
Orthopaedic Research Society (also: AAOS Specialty Societies)

ORS
orthopedic surgeon

ORS
oxygen radical scavengers

ORS-ROC
Orthopedic Research Society

ORSA
osteoclast resorption stimulating activity

ORT
object relations technique; operating room technician; oral rehydration therapy

ort
operating room technician

ort
oral rehydration therapy

orth
ortho orthopedics

Ortho
ORTH

ortho
orthopaedic surgery

Ortho
orthopedics

ORV
Orthopaedic Research of Virginia

ORW
Osler-Rendu-Weber (syndrome)

OS
(oculus sinister) left eye

OS
(oculus sinister) left eye

OS
(oculus sinister) left eye

OS
bone

os
bone (Lat ossa)

os
esophageal spasm

os
mouth

os
mouth (Lat oris)

os
occipitosacral

Os
occupational safety

os
oculus sinister

Os
office surgery

Os
Omenn syndrome

os
opening snap

Os
operating system

Os
organ specific

OS
oris

Os
Osgood-Schlatter [disease]

Os
osmium

OS
osteogenic sarcoma (context bone tumors)

OS
Osteogenic sarcoma (context bone tumours)

Os
osteosclerosis

Os
oubain sensitivity

os
overall survival

OS
ozone safe

osa
obstructive sleep apnea

OSA
Office of Services to the Aging

OSA
Optical Society of America

OSA
ovarian sectional area

OSAE
Orthopaedic Special Assessment Examination (for AAOS members: Medical Education Section)

OSAS
obstructive sleep apnea syndrome

osbd
oral selective bowel decontamination

osc
oscillation

OSCAR
on-line survey

OSCC
oral squamous cell carcinoma

OSCE
objective structured clinical examination

oscs
osteopathia striata with cranial sclerosis

OSF
organ system failure; osteoclast-stimulating factor; outer spiral fiber; overgrowth stimulating factor

osfecn
osmium ferricyanide

OSHA
Occupational Safety and Health Adminstration

osi
open systems interconnection

OSI
open systems interconnection [reference model]

osm
osmolality

osm
osmole; osmosis

OSM
ovine submaxillary mucin; oxygen saturation meter

Osm/kg
osmoles per kilogram

Osm/l
osmoles per liter

OSMED
otospondylometaphyseal dysplasia

osmol
osmole

OSR
oilseed rape

osrc
osteosarcoma

OSRD
Office of Scientific Research and Development

oss
osseous

OSS
over-the-shoulder strap

OST
object sorting test; Office of Science and Technology

osteo
osteoarthritis; osteomyelitis; osteopathy

ostm
osteomyelitis

OSTOP
Osteoporosis Society of British Columbia

OSUK
Ophthalmological Society of the United Kingdom

OSV
Orbis Sigma Valves Type I

osx
opitz syndrome, x linked

ot
ear

OT
objective test; oblique talus; occlusion time; occupational therapist

OT
objective test; occupational therapy

ot
occupational therapist

OT
occupational therapy

ot
old tuberculin

OT
old tuberculin (Koch s old tuberculin) or Koch s original tuberculin

OT
olfactory threshold; optic tract; orientation test ; original tuberculin; ornithine transcarbamylase; orotracheal; orthopedic treatment; otolaryngology; otology; oxytocin; oxytryptamine

ot
operating theater

ot
optic tract

OTA
Occupational therapist assistant

OTA
occupational therapy assistant

ota
office of technology assessment

OTA
ornithine transaminase

OTA
Orthopaedic Trauma Association (Newsletter) (also: AAOS Specialty Societies)

OTA
orthotoluidine arsenite

otc
off the case

otc
ornithine transcarbamylase

otc
over the counter

OTC
over the counter (a drug that can be obtained without a prescription)

OTC
over-the-counter (pharmaceuticals)

otc
oxytetracycline

otd
oculotrichodysplasia

OTM
os tibiale mediale

oto
otolaryngology

oto
otology

oto
otorhinolaryngology

otoh
on the other hand

OTPP
Occupational therapists in private practice

OTRPC
osm TRPC

ots
otosclerosis

ots
us epa office of toxic substances

ott
office of technology transfer

otudp
odontotrichoungual digital palmar syndrome

otw
otherwise

OU
(oculus uterque) each eye

OU
(oculus uterque) each eye

OU
(oculus uterque) each eye

OU
each eye (Lat oculus uterqie)

ou
esophageal ulcer

ov
esophageal varices

ov
office visit

ovd
occlusal vertical dimension

ovr
oculovestibular reflex

ow
oval window

OWL
Orthopaedic Web Links

ox
onychauxic

OX3
orient in three spheres

oxphos
oxidative phosphorylation

OXT
oxytocin

oxyhba
oxyhemoglobin a

oxyhbs
oxyhemoglobin s

oz
ounce

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Medical Abbreviation Database (over 18,900 entries)

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