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orgasm
Sexual climax.
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organic
Having to do with substances derived from living organisms.
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organ
A structural unit of an animal or plant that serves a specific function.
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orchiectomy
The surgical removal of one or both testicles. Also called castration.
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orbit
The bony cavity containing the eyeball. Eye socket.
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optometry
The practice of eye and vision care.
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optical
Having to do with vision.
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optic neuritis
Inflammation of the optic nerve, which connects the eye to the brain. Symptoms include pain with eye movement, blurred vision…
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ophthalmology
The branch of medicine that pertains to the eye and its diseases.
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oophorectomy
The surgical removal of an ovary.
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oncology
The study of tumors.
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oliguria
A condition characterized by an abnormally small output of urine.
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oligospermia
A low number of sperm in the semen.
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oligomenorrhea
Light menstrual flow.
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olfactory
Having to do with the sense of smell.
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olecranon
The projection of the ulna (the larger of the two bones in the forearm) at the elbow.
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odontalgia
Toothache.
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ocular
Having to do with the eye.
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occupational therapy
Teaching useful skills to sick or handicapped people to promote rehabilitation and healing.
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occupational illness
Any illness caused or aggravated by a person’s job.
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occult
Hidden from view.
Trusted medical advice from the
American Academy of Family Physicians.
American Academy of Family Physicians.
Go to familydoctor.org Home
Trusted medical advice from the
American Academy of Family Physicians.
American Academy of Family Physicians.
Dictionary of Medical Terms
Gain a better understanding of medical terminology by searching our dictionary of more than 1,300 terms.
