Medical Dictionary Definitions A-Z List
Medical Dictionary Definitions A - Z - «O»:
Otitis media, acute
Otitis media, acute: See: Acute otitis media....
Oto-: Prefix meaning ear, as in otolaryngologist and otoscope. Oto- becomes ot- before a vowel, as in otalgia and otitis. From the Greek "otos" pertaining to the ear....
Otoacoustic emission test
Otoacoustic emission test
(OAE): An otoacoustic emission test (OAE) measures an acoustic response that is
produced by the inner ear (cochlea), which in essence bounces back out of the
ear in response to a sound stimulus. The test is performed by placing a small
probe that contains a microphone a...
Otolaryngologist: A physician specialized in diagnosing and treating diseases of the head and neck, especially those involving the ears, nose, and throat (ENT). Also called an ENT, ENT doctor, or ENT physician....
Otolaryngology: A medical and surgical specialty concerned with the diagnosis, management, and treatment of diseases and disorders of the ear, nose, throat (ENT) and related structures of the head and neck, including the sinuses, larynx (voice box), oral cavity, and upper pharynx (mouth and throat)....
Otology: The study and medical care of the
Otopharyngeal tube: The tube that runs from the middle ear to the pharynx, known also as the
The function of this tube is to protect, aerate and drain the middle ear (and mastoid). Occlusion of the
Eustachian tube leads to the development of middle ear inflammation (otitis media)....
Otoplasty: Plastic surgery to reshape the outer
Otosclerosis: The abnormal formation of new bone in the middle ear that gradually immobilizes the stapes (stirrup bone) and prevents it from vibrating in response to sound, causing progressive loss of hearing. Otosclerosis usually affects both ears. It is a common disorder, especially among young w...
Otoscope: Instrument for looking in the ear. Today, otoscopic or
ophthalmoscopic heads can usually be attached to the base (which supplies the electrical
power) to look at the ears or eyes. ...
Ounce: A measure of weight equal to 1/16th
of a pound or, metrically, 28.35 grams. The abbreviation for ounce is oz. (An ounce of
prevention is reputedly worth a pound of cure.)...
Outer ear: There are three sections of the ear: the
outer ear, the middle ear, and the inner ear. The outer ear looks
but it is
functionally the simplest part of the ear. It consists of
the pinna or
(the visible projecting portion of the ear), the external
Outlet: The exit or opening. The means by which something escapes....
Outlet, gastric: See: Gastric outlet....
Outpatient: A patient who is not an inpatient (not
hospitalized) but instead is cared for elsewhere -- as in a doctor's office, clinic, or day surgery center. The term outpatient dates back at least to 1715. Outpatient care today is also called ambulatory care....