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window

 [win´do]
a circumscribed opening in a plane surface; called also fenestra.
aortic window a radiolucent region below the aortic arch, formed by the bifurcation of the trachea, visible in the left anterior oblique radiograph of the heart and great vessels.
window of cochlea (cochlear window) round window.
oval window an oval opening in the inner wall of the middle ear, which is closed by the stapes; called also vestibular window and fenestra vestibuli.
round window a round opening in the middle ear covered by the secondary tympanic membrane; called also cochlear window and fenestra cochleae.
vestibular window (window of vestibule) oval window.

win·dow

(win'dō),
1.
See also: CT number, window level, window width. Synonym(s): fenestra
2. Any opening in space or time, particularly a critical interval within which a given event must, or cannot, occur.
See also: CT number, window level, window width.
3. computed tomography the range of CT numbers (in Hounsfield units) across which all shades of the gray scale are distributed in a given image so as to emphasize slight differences in x-ray absorption coefficients between tissues of similar density (for example, mediastinal soft tissues).
See also: CT number, window level, window width.

window

/win·dow/ (win´do)
1. a circumscribed opening in a plane surface.
2. the voltage limits that determine which pulses will be allowed to pass on.

aortic window  a transparent region below the aortic arch, formed by the bifurcation of the trachea, visible in the left anterior oblique radiograph of the heart and great vessels.
oval window  fenestra vestibuli.
round window  fenestra cochleae.

window

Etymology: AS, wind, air, owe, eye
1 a surgically created opening in the surface of a structure or an anatomically occurring opening in the surface or between the chambers of a structure.
2 a specific time period during which a phenomenon can be observed, a reaction monitored, or a procedure initiated.
adjective Referring to an interruption in time or space
noun An interruption in time or space
verb To create an interruption in space
Cytology A narrow, slit-like clear space between 2 moulded mesothelial cells, which may be joined to each other by 'articulations'
Imaging noun An interval of photon energies used in a scintillation counter—gamma-ray detector; the so-called ‘pulse height analyser’ rejects any photon energy falling outside of the window—and is thus not counted
verb To adjust a field for optimal visualisation by an imaging modality
Physiology An opening in a biologic membrane, through which solutes may be transported
Surgery A point of an abscess in closest contact with the abdominal wall—or any accessible skin surface without an intervening visceral organ, which can be opened for safe drainage

window

adjective Referring to an interruption in time or space. See Core window, Fertilization window, Round window, Square window, Therapeutic window Radiology An interval of photon energies used in a scintillation counter–gamma-ray detector; the so-called 'pulse height analyzer' rejects any photon energy falling outside of the window–and is thus not counted SurgeryA region of an abscess in closest contact with the abdominal wall–or any accessible skin surface without an intervening visceral organ, which can be opened for relatively safe drainage.

fe·nes·tra

, pl. fenestrae (fĕ-nes'tră, -trē)
1. An anatomic aperture, often closed by a membrane.
2. An opening left in a cast or other form of fixed dressing to permit access to a wound or inspection of the part.
3. The opening in one of the blades of an obstetric forceps.
4. A lateral opening in the sheath of an endoscopic instrument that allows lateral viewing or operative maneuvering through the sheath.
5. Openings in the wall of a tube, catheter, or trocar designed to promote better flow of air or fluids.
Synonym(s): window.
[L. window]

win·dow

(win'dō)
1. Synonym(s): fenestra.
2. Any opening in space or time, particularly a critical interval within which a given event must, or cannot, occur.
3. In computed tomography, range of CT numbers (expressed in Hounsfield units) across which all shades of the gray scale are distributed in a given image so as to emphasize slight differences in x-ray absorption coefficients between tissues of similar density (e.g., mediastinal soft tissues).

window

a circumscribed opening in a plane surface.

cochlear window, fenestra cochleae
an aperture between the tympanic cavity of the middle ear and the cochlea of the internal ear; covered by the secondary tympanic membrane. Called also round window.
oval window
an oval opening in the inner wall of the middle ear, which is closed by the stapes; called also fenestra vestibuli.
round window
see cochlear window (above).

Patient discussion about window

Q. what is the window phase for HIV?

A. The 'window' period for HIV infection describes the strong immune defense that reduces the number of viral particles in the blood stream, marking the start of the infection's clinical latency stage. Clinical latency can vary between two weeks and 20 years. During this early phase of infection, HIV is active within lymphoid organs, where large amounts of virus become trapped in the follicular dendritic cells. The surrounding tissues that are rich in CD4+ T cells may also become infected, and viral particles accumulate both in infected cells and as free virus. Individuals who are in this phase are still infectious.

More discussions about window
References in periodicals archive ?
We sampled a larger number of window sills per home, compared to floors and window troughs, to increase the power to detect a pre-/postcleaning difference in lead loading.
Mr Williams took photos of an ashtray full of smoked cigarettes on his mum's window sill last month.
A MUM whose two-year-old son died after swallowing toxic plant food told police she did not think he could reach a window sill where the bottle was kept.
So I hit him on the hand as he was hanging onto the window sill.
The first is to pot it up and keep it over the winter in a greenhouse or on a window sill.
I can remember Mick Jagger one day sitting on the window sill in the canteen playing his guitar and singing to some ecstatic female fans outside," he said.
I would just like to say to the dog owner who was on the back lane of Lindley Street, Milnsbridge at about 6o'clock on Saturday morning, how could you let your dogs into people's gardens to drag their cats off the window sill and drag them around?
The cleaning with frames also includes the cleaning of the rebates and fittings as well as the external window sills for the price item "window cleaning with frame and window sill outside.
Emma Hall, prosecuting for the city council, told Birmingham Magistrates that a cook at the nursery carried the jug of custard on a tray before placing it on a window sill.