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Medical Dictionary Terms Beginning with O
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Optic
Optic: Having to do with vision.more detail info...
Optic nerve
Optic nerve: The nerve that connects the eye to the brain and carries the impulses formed by the retina -- the nerve layer that lines the back of the eye, senses light and creates the impulses -- to the brain which interprets them as images. The opmore detail info...
Optic neuroma
Optic neuroma: A benign tumor of the optic nerve.more detail info...
Optometrist
Optometrist: Professional trained to provide primary eye and vision care and improve vision with glasses, contact lenses, etc. An optometrist is an O.D. (Doctor of Optometry), not an M.D.more detail info...
OR (abbreviation)
OR (abbreviation): Stands for "operating room". A facility equipped for performing surgery. OR is sometimes written O.R.more detail info...
Oral
Oral: Having to do with the mouth.more detail info...
Oral cancer
Oral cancer: Cancer within the mouth. Please see Medicine Online site on RAL CANCER for more information.more detail info...
Oral surgeon
Oral surgeon: A dentist with special training in surgery of the mouth and jaw.more detail info...
Orbit
Orbit: In medicine, the bony cavity in which the eyeball sits.more detail info...
Orbital ridge
Orbital ridge: The bony ridge beneath the eyebrow.more detail info...
Orchiectomy
Orchiectomy: The surgical removal of the testicles.more detail info...
Orchitis
Orchitis: Inflammation of the testis (male sex organ). There are many causes of inflammation of the testis including infections (such as mumps), diseases (such as polyarteritis nodosa), or injury. Also called orchiditis.more detail info...
Organisation Mondiale de la SantΘ (OMS)
Organisation Mondiale de la SantΘ (OMS): The World Health Organization (WHO).more detail info...
Orifice
Orifice: An opening. The mouth for example is an orifice.more detail info...
Oromandibular dystonia
Oromandibular dystonia: Oro- refers to the mouth and mandibular refers to the lower jaw. Oromandibular dystonia affects the muscles of the jaw, lips, and tongue. The jaw may be pulled either open or shut, and speech and swallowing can be difficult.more detail info...
Oropharynx
Oropharynx: The area of the throat at the back of the mouth.more detail info...
Ortho- (prefix)
Ortho- (prefix): Prefix meaning straight or erect. From the Greek "orthos" that means just that: straight or erect. Examples of terms involving ortho- include orthodontics (straightening the teeth), orthopaedics (straightening the child), orthopneamore detail info...
Orthodontic treatment (dental braces)
Orthodontic treatment (dental braces): Please see Medicine Online site on ORTHODONTIC TREATMENT for information on this subject.more detail info...
Orthopaedics
Orthopaedics: The branch of surgery broadly concerned with the skeletal system (bones). This particular term is commonly misspelled. Orthopedics is how this field of surgery is listed under Physicians & Surgeons in the telephone Yellow Pages imore detail info...
Orthopaedist
Orthopaedist: An orthopaedic surgeon, a surgeon broadly concerned with the skeletal system (bones). The spelling of "orthopedist" with an "e" is quite common today but it is incorrect because it relates the term to the foot since in Latin "pedismore detail info...