Medical Terms That Start With O -(Medical Words Mastery)

The field of medicine is vast and diverse, encompassing a plethora of terms, each bearing its unique importance. Often, students, professionals, and enthusiasts find themselves navigating through this expansive sea of terminologies. Among these terms, those starting with the letter “O” have their significance, whether they denote a specific disease, symptom, or procedure. Let’s have a closer look at these terms.

Medical Terms That Start With O

Here is the list of the most popular words that start with the letter O:

  1. Ophthalmology
  2. Osteoporosis
  3. Oncology
  4. Otitis
  5. Ovarian
  6. Orthopedics
  7. Osmosis
  8. Obstruction
  9. Ovulation
  10. Otolaryngology

Diseases and Conditions With O

  1. Osteoarthritis
  2. Osteomalacia
  3. Obsessive-compulsive disorder (OCD)
  4. Ovarian cysts
  5. Otitis media
  6. Oral thrush
  7. Osteopenia
  8. Ophthalmoplegia
  9. Oliguria
  10. Oropharyngeal cancer
  11. Osgood-Schlatter disease
  12. Overactive bladder

Symptoms With O

  1. Oliguria (low urine output)
  2. Oscillopsia (jumpy vision)
  3. Orthostatic hypotension
  4. Onycholysis (nail separation)
  5. Ophthalmalgia (eye pain)
  6. Otorrhea (ear discharge)
  7. Otalgia (ear pain)
  8. Oral ulcers
  9. Odynophagia (painful swallowing)
  10. Out-toeing
  11. Obnubilation (clouded consciousness)

Procedures With O

  1. Oophorectomy (removal of ovaries)
  2. Otoplasty (ear surgery)
  3. Osteotomy
  4. Osmotic dilation
  5. Orchiectomy
  6. Osteoplasty
  7. Open reduction
  8. Oculoplastic surgery
  9. Ostomy
  10. Orbital decompression
  11. Osteosynthesis

Medications With O

  1. Oxycodone
  2. Omeprazole
  3. Olmesartan
  4. Olanzapine
  5. Oseltamivir
  6. Ofloxacin
  7. Ondansetron
  8. Orlistat
  9. Oxymetazoline
  10. Oxytocin
  11. Optrex

Imaging and Tests With O

  1. Ophthalmoscopy
  2. Otoscopy
  3. Oximetry
  4. Ovulation test
  5. Oral glucose tolerance test (OGTT)
  6. Octreotide scan
  7. Orthopantomogram
  8. Oblique MRI
  9. Otoacoustic emission test
  10. Optical coherence tomography (OCT)
  11. Osteodensitometry

Vaccination and Immunology With O

  1. Oral polio vaccine (OPV)
  2. OspA Lyme vaccine
  3. Outer membrane vesicle vaccines
  4. Ocular herpes vaccine (experimental)
  5. O’Nyong-nyong fever vaccine (research)
  6. Oral typhoid vaccine
  7. Orthopoxvirus vaccines
  8. OncoVAX
  9. OPA protein vaccines
  10. Oncolytic virus vaccines
  11. Osteosarcoma vaccine

Drugs With O

  1. Oxazepam
  2. Oxaliplatin
  3. Oxandrolone
  4. Oxtriphylline
  5. Oxybutynin
  6. Olopatadine
  7. Oxytetracycline
  8. Ofatumumab
  9. Ozanimod
  10. Omadacycline
  11. Oritavancin

A to Z Medical Glossary

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Medical Words With O & Their Meanings

  1. Ophthalmology – The study of eye disorders.
  2. Osteoporosis – A condition where bones become weak and brittle.
  3. Oncology – The study of cancer.
  4. Otitis – Inflammation of the ear.
  5. Ovarian – Relating to the ovaries.
  6. Orthopedics – The study of the musculoskeletal system.
  7. Osmosis – Movement of solvent through a semipermeable membrane.
  8. Obstruction – A blockage in a bodily structure or passage.
  9. Ovulation – Release of an egg from the ovary.
  10. Otolaryngology – Study of ear, nose, and throat conditions.
  11. Osteoarthritis – Degeneration of joint cartilage.
  12. Osteomalacia – Softening of bones due to vitamin D deficiency.
  13. Obsessive-compulsive disorder (OCD) – A condition characterized by repeated unwanted thoughts and behaviors.
  14. Ovarian cysts – Fluid-filled sacs in the ovary.
  15. Otitis media – Inflammation of the middle ear.
  16. Oral thrush – Yeast infection in the mouth.
  17. Osteopenia – Reduced bone density but not as severe as osteoporosis.
  18. Ophthalmoplegia – Paralysis of the eye muscles.
  19. Oliguria – Production of abnormally small amounts of urine.
  20. Oropharyngeal cancer – Cancer of the oropharynx, part of the throat.
  21. Osmolarity – Concentration of solute in a solution.
  22. Ovum – A mature female reproductive cell.
  23. Orthostatic hypotension – A drop in blood pressure upon standing.
  24. Orchiectomy – Surgical removal of one or both testicles.
  25. Osteogenesis – Bone formation.
  26. Otoplasty – Surgical reshaping of the ear.
  27. Oligodendrocyte – Cell that produces the myelin sheath around nerve fibers.
  28. Orbit – Bony cavity containing the eye.
  29. Oxytocin – Hormone that induces labor and milk ejection.
  30. Ossicle – Small bone, especially within the ear.
  31. Occlusion – Blockage or obstruction.
  32. Osteocyte – Bone cell.
  33. Ostomy – An artificial opening made for excretion.
  34. Oral – Relating to the mouth.
  35. Oncogene – Gene that has the potential to cause cancer.
  36. Osteotomy – Surgical cutting of bone.
  37. Olfactory – Relating to the sense of smell.
  38. Oximetry – Measurement of oxygen saturation in the blood.
  39. Osteopath – Practitioner who treats musculoskeletal issues using manual techniques.
  40. Organogenesis – Formation and development of organs in an embryo.
  41. Oropharynx – Part of the throat at the back of the mouth.
  42. Occlusive – Designed to close or block a passage.
  43. Oocyte – Cell in the ovary that can develop into an ovum.
  44. Oogenesis – The formation of ova or eggs in the ovaries.
  45. Otoscope – Instrument to examine the ear.
  46. Ophthalmoscope – Instrument to examine the retina of the eye.
  47. Orthotic – Device to support or correct musculoskeletal deformities.
  48. Osseous – Relating to bone.
  49. Omentum – Fold of the peritoneum supporting the stomach and other abdominal organs.
  50. Orchiopexy – Surgery to move an undescended testicle into the scrotum.
  51. Optic – Relating to vision or the eye.
  52. Osmotic – Relating to osmosis.
  53. Otorrhea – Discharge from the ear.
  54. Oxalate – Salt or ester of oxalic acid.
  55. Oncotic pressure – Form of osmotic pressure exerted by proteins.
  56. Opportunistic infection – Infections that occur because of a weakened immune system.
  57. Orthopedist – Doctor specializing in the musculoskeletal system.
  58. Osteopathology – Study of bone diseases.
  59. Obesity – Excess body fat negatively affects health.
  60. Ophthalmic – Pertaining to the eye.
  61. Outpatient – A patient who visits a hospital for treatment without staying overnight.
  62. Osteology – Study of the structure and function of bones.
  63. Organoid – Miniaturized and simplified organ produced in vitro.
  64. Oral cavity – The mouth.
  65. Obligate – Restricted to a particular way of life.
  66. Orthogonal – At right angles; often used in the context of medical imaging.
  67. Odontoid – Tooth-like, especially a bony projection in the cervical spine.
  68. Orbital fracture – Breakage of bones of the eye socket.
  69. Osteoplasty – Surgical repair of bone.
  70. Ovotestis – Organ with both ovarian and testicular tissues.
  71. Otitis externa – Inflammation of the outer ear canal.
  72. Odontalgia – Tooth pain.
  73. Oral hygiene – practice of keeping the mouth and teeth clean.
  74. Optometry – Profession of examining eyes for visual defects.
  75. Oligopeptide – Short chain of amino acids.
  76. Orthokeratology – Use of contact lenses to reshape the cornea.
  77. Omphalocele – Birth defect where organs protrude from the belly button.
  78. Optic nerve – Nerve transmitting visual information from the retina to the brain.
  79. Oncovirus – Virus that can cause cancer.
  80. Outgrowth – Growth beyond the normal.
  81. Ostectomy – Surgical removal of bone.
  82. Obliteration – Removal or closing of a body passage or structure.
  83. Osteoblast – Cell that forms bone.
  84. Ophthalmia – Inflammation of the eye.
  85. Oncologist – Doctor specializing in treating cancer.
  86. Orchiodynia – Testicular pain.
  87. Optic disc – Point where the optic nerve enters the retina.
  88. Oxyhemoglobin – Hemoglobin combined with oxygen.
  89. Ochronosis – Dark pigmentation due to the buildup of homogentisic acid.
  90. Oophoritis – Inflammation of the ovaries.
  91. Oral mucosa – Mucous membrane lining the inside of the mouth.
  92. Odontology – Study of the structure and diseases of teeth.
  93. Olecranon – Pointed bone at the tip of the elbow.
  94. Orthopnea – Difficulty breathing when lying down.
  95. Onychomycosis – Fungal infection of the nails.
  96. Os trigonum – An accessory bone behind the ankle bone.
  97. Optic chiasm – X-shaped structure where the optic nerves cross.
  98. Ophthalmic artery – Artery supplying the eyes.
  99. Otosclerosis – Abnormal bone growth in the middle ear.
  100. Oncolytic – Pertaining to the destruction of tumor cells.
  101. Oculomotor – Relating to the movement of the eye.
  102. Olfaction – The sense of smell.
  103. Oral contraceptive – Drug taken orally to prevent pregnancy.
  104. Onychophagia – Habit of biting one’s nails.

Medical Terms That Start With O