Medical Dictionary Online

Medical terminology that starts with [O]

• O Antigens
• O'nyong-nyong Virus
• O(6)-Methylguanine-DNA Methyltransferase
• O-Acetyl-ADP-Ribose
• o-Aminoazotoluene
• o-Chlorobenzylidenemalonitrile
• o-Phthalaldehyde
• Obesity
• Obesity Hypoventilation Syndrome
• Obesity, Abdominal
• Obesity, Metabolically Benign
• Obesity, Morbid
• Obidoxime Chloride
• Object Attachment
• Observation
• Observational Studies as Topic
• Observational Study
• Observer Variation
• Obsessive Behavior
• Obsessive-Compulsive Disorder
• Obstetric Labor Complications
• Obstetric Labor, Premature
• Obstetric Nursing
• Obstetric Surgical Procedures
• Obstetrical Forceps
• Obstetrics
• Obstetrics and Gynecology Department, Hospital
• Obturator Nerve
• Occipital Bone
• Occipital Lobe
• Occludin
• Occlusal Adjustment
• Occlusal Splints
• Occlusive Dressings
• Occult Blood
• Occultism
• Occupational Dentistry
• Occupational Diseases
• Occupational Exposure
• Occupational Groups
• Occupational Health
• Occupational Health Nursing
• Occupational Health Physicians
• Occupational Health Services
• Occupational Injuries
• Occupational Medicine
• Occupational Therapists
• Occupational Therapy
• Occupational Therapy Department, Hospital
• Occupations
• Oceania
• Oceanic Ancestry Group
• Oceanography
• Oceanospirillaceae
• Oceans and Seas
• Ochlerotatus
• Ochnaceae
• Ochratoxins
• Ochrobactrum
• Ochrobactrum anthropi
• Ochromonas
• Ochronosis
• Ochrosia
• Ocimum
• Ocimum basilicum
• Ocimum sanctum
• Ocotea
• Octamer Transcription Factor-1
• Octamer Transcription Factor-2
• Octamer Transcription Factor-3
• Octamer Transcription Factor-6
• Octamer Transcription Factors
• Octanes
• Octanols
• Octodon
• Octopamine
• Octopodiformes
• Octoxynol
• Octreotide
• Ocular Absorption
• Ocular Hypertension
• Ocular Hypotension
• Ocular Motility Disorders
• Ocular Physiological Phenomena
• Oculocerebrorenal Syndrome
• Oculomotor Muscles
• Oculomotor Nerve
• Oculomotor Nerve Diseases
• Oculomotor Nerve Injuries
• Oculomotor Nuclear Complex
• Odds Ratio
• Odonata
• Odontoblasts
• Odontodysplasia
• Odontogenesis
• Odontogenic Cyst, Calcifying
• Odontogenic Cysts
• Odontogenic Tumor, Squamous
• Odontogenic Tumors
• Odontoid Process
• Odontoma
• Odontometry
• Odorants
• Oedipus Complex
• Oenanthe
• Oenococcus
• Oenothera
• Oenothera biennis
• Oesophagostomiasis
• Oesophagostomum
• Off-Label Use
• Off-Road Motor Vehicles
• Office Automation
• Office Management
• Office Nursing
• Office Visits
• Ofloxacin
• Ohio
• Oil and Gas Fields
• Oil and Gas Industry
• Oils
• Oils, Volatile
• Ointment Bases
• Ointments
• Okadaic Acid
• Oklahoma
• Olacaceae
• Old Age Assistance
• Oldenlandia
• Olea
• Oleaceae
• Oleandomycin
• Oleanolic Acid
• Oleavirus
• Olecranon Process
• Oleic Acid
• Oleic Acids
• Olfaction Disorders
• Olfactometry
• Olfactory Bulb
• Olfactory Cortex
• Olfactory Marker Protein
• Olfactory Mucosa
• Olfactory Nerve
• Olfactory Nerve Diseases
• Olfactory Nerve Injuries
• Olfactory Pathways
• Olfactory Perception
• Olfactory Receptor Neurons
• Olfactory Tubercle
• Oligo-1,6-Glucosidase
• Oligochaeta
• Oligoclonal Bands
• Oligodendrocyte-Myelin Glycoprotein
• Oligodendroglia
• Oligodendroglioma
• Oligodeoxyribonucleotides
• Oligodeoxyribonucleotides, Antisense
• Oligohydramnios
• Oligohymenophorea
• Oligomenorrhea
• Oligomycins
• Oligonucleotide Array Sequence Analysis
• Oligonucleotide Probes
• Oligonucleotides
• Oligonucleotides, Antisense
• Oligopeptides
• Oligoribonucleotides
• Oligoribonucleotides, Antisense
• Oligosaccharides
• Oligosaccharides, Branched-Chain
• Oligospermia
• Oliguria
• Olivary Nucleus
• Olive Oil
• Olivomycins
• Olivopontocerebellar Atrophies
• Olmesartan Medoxomil
• Olopatadine Hydrochloride
• Omalizumab
• Oman
• Omasum
• omega-Agatoxin IVA
• omega-Chloroacetophenone
• omega-Conotoxin GVIA
• omega-Conotoxins
• omega-Crystallins
• omega-N-Methylarginine
• Omentum
• Omeprazole
• Onagraceae
• Onchocerca
• Onchocerca volvulus
• Onchocerciasis
• Onchocerciasis, Ocular
• Oncogene Fusion
• Oncogene Protein gp140(v-fms)
• Oncogene Protein p21(ras)
• Oncogene Protein p55(v-myc)
• Oncogene Protein p65(gag-jun)
• Oncogene Protein pp60(v-src)
• Oncogene Protein tpr-met
• Oncogene Protein v-akt
• Oncogene Protein v-cbl
• Oncogene Protein v-crk
• Oncogene Protein v-maf
• Oncogene Proteins
• Oncogene Proteins v-abl
• Oncogene Proteins v-erbA
• Oncogene Proteins v-erbB
• Oncogene Proteins v-fos
• Oncogene Proteins v-mos
• Oncogene Proteins v-myb
• Oncogene Proteins v-raf
• Oncogene Proteins v-rel
• Oncogene Proteins v-sis
• Oncogene Proteins, Fusion
• Oncogene Proteins, Viral
• Oncogenes
• Oncogenic Viruses
• Oncologists
• Oncology Nursing
• Oncology Service, Hospital
• Oncolytic Virotherapy
• Oncolytic Viruses
• Oncorhynchus
• Oncorhynchus keta
• Oncorhynchus kisutch
• Oncorhynchus mykiss
• Oncostatin M
• Oncostatin M Receptor beta Subunit
• Ondansetron
• One-Carbon Group Transferases
• One-Lung Ventilation
• Onecut Transcription Factors
• Onions
• Onium Compounds
• Online Systems
• Only Child
• Ononis
• Onopordum
• Ontario
• Onycholysis
• Onychomycosis
• Onygenales
• Oocysts
• Oocyte Donation
• Oocyte Retrieval
• Oocytes
• Oogenesis
• Oogonia
• Oogonial Stem Cells
• Oomycetes
• Oophoritis
• Open Access Publishing
• Open Bite
• Open Fracture Reduction
• Open Reading Frames
• Operating Room Information Systems
• Operating Room Nursing
• Operating Room Technicians
• Operating Rooms
• Operating Tables
• Operations Research
• Operative Blood Salvage
• Operative Time
• Operator Regions, Genetic
• Operon
• Ophiopogon
• Ophiostoma
• Ophiostomatales
• Ophthalmia Neonatorum
• Ophthalmia, Sympathetic
• Ophthalmic Artery
• Ophthalmic Assistants
• Ophthalmic Nerve
• Ophthalmic Solutions
• Ophthalmodynamometry
• Ophthalmologic Surgical Procedures
• Ophthalmologists
• Ophthalmology
• Ophthalmoplegia
• Ophthalmoplegia, Chronic Progressive External
• Ophthalmoplegic Migraine
• Ophthalmoscopes
• Ophthalmoscopy
• Opiate Alkaloids
• Opiate Substitution Treatment
• Opioid Peptides
• Opioid-Related Disorders
• Opipramol
• Opisthorchiasis
• Opisthorchidae
• Opisthorchis
• Opium
• Oplopanax
• Opossums
• Opportunistic Infections
• Opsins
• Opsoclonus-Myoclonus Syndrome
• Opsonin Proteins
• Optic Atrophies, Hereditary
• Optic Atrophy
• Optic Atrophy, Autosomal Dominant
• Optic Atrophy, Hereditary, Leber
• Optic Chiasm
• Optic Disk
• Optic Disk Drusen
• Optic Flow
• Optic Lobe, Nonmammalian
• Optic Nerve
• Optic Nerve Diseases
• Optic Nerve Glioma
• Optic Nerve Injuries
• Optic Nerve Neoplasms
• Optic Neuritis
• Optic Neuropathy, Ischemic
• Optic Tract
• Optical Devices
• Optical Fibers
• Optical Illusions
• Optical Imaging
• Optical Phenomena
• Optical Restriction Mapping
• Optical Rotation
• Optical Rotatory Dispersion
• Optical Storage Devices
• Optical Tweezers
• Optically Stimulated Luminescence Dosimetry
• Optics and Photonics
• Optimism
• Optogenetics
• Optometrists
• Optometry
• Opuntia
• ORAI1 Protein
• ORAI2 Protein
• Oral and Maxillofacial Surgeons
• Oral Fistula
• Oral Health
• Oral Hemorrhage
• Oral Hygiene
• Oral Hygiene Index
• Oral Manifestations
• Oral Medicine
• Oral Mucosal Absorption
• Oral Sprays
• Oral Stage
• Oral Submucous Fibrosis
• Oral Surgical Procedures
• Oral Surgical Procedures, Preprosthetic
• Oral Ulcer
• Orbit
• Orbit Evisceration
• Orbital Cellulitis
• Orbital Diseases
• Orbital Fractures
• Orbital Implants
• Orbital Myositis
• Orbital Neoplasms
• Orbital Pseudotumor
• Orbivirus
• Orchidaceae
• Orchiectomy
• Orchiopexy
• Orchitis
• Oregon
• Orexin Receptor Antagonists
• Orexin Receptors
• Orexins
• Orf virus
• Organ Culture Techniques
• Organ Dysfunction Scores
• Organ of Corti
• Organ Preservation
• Organ Preservation Solutions
• Organ Size
• Organ Sparing Treatments
• Organ Specificity
• Organ Trafficking
• Organ Transplantation
• Organelle Biogenesis
• Organelle Shape
• Organelle Size
• Organelles
• Organic Agriculture
• Organic Anion Transport Protein 1
• Organic Anion Transporters
• Organic Anion Transporters, ATP-Dependent
• Organic Anion Transporters, Sodium-Dependent
• Organic Anion Transporters, Sodium-Independent
• Organic Cation Transport Proteins
• Organic Cation Transporter 1
• Organic Chemicals
• Organic Chemistry Phenomena
• Organically Modified Ceramics
• Organisation for Economic Co-Operation and Development
• Organism Forms
• Organisms, Genetically Modified
• Organization and Administration
• Organizational Affiliation
• Organizational Case Studies
• Organizational Culture
• Organizational Innovation
• Organizational Objectives
• Organizational Policy
• Organizations
• Organizations, Nonprofit
• Organizers, Embryonic
• Organofluorophosphonates
• Organogenesis
• Organogenesis, Plant
• Organogold Compounds
• Organoids
• Organomercury Compounds
• Organometallic Compounds
• Organophosphate Poisoning
• Organophosphates
• Organophosphonates
• Organophosphorus Compounds
• Organoplatinum Compounds
• Organoselenium Compounds
• Organosilicon Compounds
• Organotechnetium Compounds
• Organotherapy
• Organothiophosphates
• Organothiophosphonates
• Organothiophosphorus Compounds
• Organotin Compounds
• Organs at Risk
• Organum Vasculosum
• Orgasm
• Orientation
• Orientation, Spatial
• Orientia tsutsugamushi
• Origanum
• Origin of Life
• Origin Recognition Complex
• Ornidazole
• Ornipressin
• Ornithine
• Ornithine Carbamoyltransferase
• Ornithine Carbamoyltransferase Deficiency Disease
• Ornithine Decarboxylase
• Ornithine Decarboxylase Inhibitors
• Ornithine-Oxo-Acid Transaminase
• Ornithobacterium
• Ornithodoros
• Ornithogalum
• Oroantral Fistula
• Orobanchaceae
• Orobanche
• Orofaciodigital Syndromes
• Oropharyngeal Neoplasms
• Oropharynx
• Orosomucoid
• Orotate Phosphoribosyltransferase
• Orotic Acid
• Orotidine-5'-Phosphate Decarboxylase
• Orphan Drug Production
• Orphan Nuclear Receptors
• Orphanages
• Orphenadrine
• ortho-Aminobenzoates
• Orthobunyavirus
• Orthodontic Anchorage Procedures
• Orthodontic Appliance Design
• Orthodontic Appliances
• Orthodontic Appliances, Functional
• Orthodontic Appliances, Removable
• Orthodontic Brackets
• Orthodontic Extrusion
• Orthodontic Friction
• Orthodontic Retainers
• Orthodontic Space Closure
• Orthodontic Wires
• Orthodontics
• Orthodontics, Corrective
• Orthodontics, Interceptive
• Orthodontics, Preventive
• Orthodontists
• Orthognathic Surgery
• Orthognathic Surgical Procedures
• Orthohepadnavirus
• Orthokeratologic Procedures
• Orthomolecular Therapy
• Orthomyxoviridae
• Orthomyxoviridae Infections
• Orthopedic Equipment
• Orthopedic Fixation Devices
• Orthopedic Nursing
• Orthopedic Procedures
• Orthopedic Surgeons
• Orthopedics
• Orthopoxvirus
• Orthopsychiatry
• Orthoptera
• Orthoptics
• Orthoreovirus
• Orthoreovirus, Avian
• Orthoreovirus, Mammalian
• Orthosiphon
• Orthostatic Intolerance
• Orthotic Devices
• Oryza
• Oryzias
• Oscillatoria
• Oscillometry
• Oseltamivir
• Osmeriformes
• Osmium
• Osmium Compounds
• Osmium Tetroxide
• Osmolar Concentration
• Osmometry
• Osmoregulation
• Osmosis
• Osmotic Fragility
• Osmotic Pressure
• Osseointegration
• Ossicular Prosthesis
• Ossicular Replacement
• Ossification of Posterior Longitudinal Ligament
• Ossification, Heterotopic
• Osteitis
• Osteitis Deformans
• Osteitis Fibrosa Cystica
• Osteoarthritis
• Osteoarthritis, Hip
• Osteoarthritis, Knee
• Osteoarthritis, Spine
• Osteoarthropathy, Primary Hypertrophic
• Osteoarthropathy, Secondary Hypertrophic
• Osteoblastoma
• Osteoblasts
• Osteocalcin
• Osteochondritis
• Osteochondritis Dissecans
• Osteochondrodysplasias
• Osteochondroma
• Osteochondromatosis
• Osteochondrosis
• Osteoclasts
• Osteocytes
• Osteogenesis
• Osteogenesis Imperfecta
• Osteogenesis, Distraction
• Osteology
• Osteolysis
• Osteolysis, Essential
• Osteoma
• Osteoma, Osteoid
• Osteomalacia
• Osteomyelitis
• Osteonecrosis
• Osteonectin
• Osteopathic Medicine
• Osteopathic Physicians
• Osteopetrosis
• Osteophyte
• Osteopoikilosis
• Osteopontin
• Osteoporosis
• Osteoporosis, Postmenopausal
• Osteoporotic Fractures
• Osteoprotegerin
• Osteoradionecrosis
• Osteosarcoma
• Osteosarcoma, Juxtacortical
• Osteosclerosis
• Osteotomy
• Osteotomy, Le Fort
• Osteotomy, Sagittal Split Ramus
• Ostertagia
• Ostertagiasis
• Ostomy
• Ostrea
• Ostreidae
• Otitis
• Otitis Externa
• Otitis Media
• Otitis Media with Effusion
• Otitis Media, Suppurative
• Otoacoustic Emissions, Spontaneous
• Otolaryngologists
• Otolaryngology
• Otolithic Membrane
• Otologic Surgical Procedures
• Otomycosis
• Otorhinolaryngologic Diseases
• Otorhinolaryngologic Neoplasms
• Otorhinolaryngologic Surgical Procedures
• Otosclerosis
• Otoscopes
• Otoscopy
• Otters
• Ottoman Empire
• Otx Transcription Factors
• Ouabain
• Out-of-Hospital Cardiac Arrest
• Outcome and Process Assessment (Health Care)
• Outcome Assessment (Health Care)
• Outliers, DRG
• Outlines
• Outpatient Clinics, Hospital
• Outpatients
• Outsourced Services
• Oval Window, Ear
• Ovalbumin
• Ovarian Cysts
• Ovarian Diseases
• Ovarian Follicle
• Ovarian Function Tests
• Ovarian Hyperstimulation Syndrome
• Ovarian Neoplasms
• Ovarian Reserve
• Ovariectomy
• Ovary
• Overall
• Overbite
• Overlearning
• Overnutrition
• Overweight
• Oviducts
• Oviparity
• Oviposition
• Ovomucin
• Ovotesticular Disorders of Sex Development
• Ovoviviparity
• Ovulation
• Ovulation Detection
• Ovulation Induction
• Ovulation Inhibition
• Ovulation Prediction
• Ovule
• Ovum
• Ovum Transport
• Ownership
• OX40 Ligand
• Oxacillin
• Oxadiazoles
• Oxalates
• Oxalic Acid
• Oxalidaceae
• Oxaloacetates
• Oxaloacetic Acid
• Oxalobacter formigenes
• Oxalobacteraceae
• Oxamic Acid
• Oxamniquine
• Oxandrolone
• Oxathiins
• Oxazepam
• Oxazepines
• Oxazines
• Oxazocines
• Oxazoles
• Oxazolidinones
• Oxazolone
• Oxepins
• Oxidants
• Oxidants, Photochemical
• Oxidation-Reduction
• Oxidative Coupling
• Oxidative Phosphorylation
• Oxidative Phosphorylation Coupling Factors
• Oxidative Stress
• Oxides
• Oxidopamine
• Oxidoreductases
• Oxidoreductases Acting on Aldehyde or Oxo Group Donors
• Oxidoreductases Acting on CH-CH Group Donors
• Oxidoreductases Acting on CH-NH Group Donors
• Oxidoreductases Acting on CH-NH2 Group Donors
• Oxidoreductases Acting on Sulfur Group Donors
• Oxidoreductases, N-Demethylating
• Oxidoreductases, O-Demethylating
• Oximes
• Oximetry
• Oxo-Acid-Lyases
• Oxocins
• Oxolinic Acid
• Oxonic Acid
• Oxotremorine
• Oxprenolol
• Oxyclozanide
• Oxycodone
• Oxyfedrine
• Oxygen
• Oxygen Compounds
• Oxygen Consumption
• Oxygen Inhalation Therapy
• Oxygen Isotopes
• Oxygen Radical Absorbance Capacity
• Oxygen Radioisotopes
• Oxygenases
• Oxygenators
• Oxygenators, Membrane
• Oxyhemoglobins
• Oxylipins
• Oxymetazoline
• Oxymetholone
• Oxymonadida
• Oxymorphone
• Oxyntomodulin
• Oxyphenbutazone
• Oxyphenisatin Acetate
• Oxyphenonium
• Oxyphil Cells
• Oxypurinol
• Oxyquinoline
• Oxysterols
• Oxytetracycline
• Oxythiamine
• Oxytocics
• Oxytocin
• Oxytricha
• Oxytropis
• Oxyuriasis
• Oxyurida
• Oxyurida Infections
• Oxyuroidea
• Ozone
• Ozone Depletion