zone

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zone

 [zōn]
an encircling region or area; by extension, any area with specific characteristics or boundary.
ciliary zone the outer of the two regions into which the anterior surface of the iris is divided by the collarette.
comfort zone an environmental temperature between 13 and 21°C (55 and 70°F) with a humidity of 30 to 55 per cent.
epileptogenic zone an area, stimulation of which may provoke an epileptic seizure.
erogenous zone (erotogenic zone) in psychoanalytic theory, an area of the body through which the libido expresses itself and which is therefore susceptible to erotic excitation upon stimulation; the primary sites are the oral, anal, and genital regions, but the other body orifices, breasts, and skin are also included.
zone of partial preservation in spinal cord injury, an area of only partial damage that may include up to three consecutive spinal segments caudal to the level of the injury.
pupillary zone the inner of the two regions into which the anterior surface of the iris is divided by the collarette.
transition zone (transitional zone) any anatomical region that marks the point at which the constituents of a structure change from one type to another; for example, the circle in the equator of the ocular lens in which epithelial fibers are developed into lens fibers, or the zone (anocutaneous line) that marks the junction of stratified squamous epithelium with columnar epithelium.

zone

(zōn), [TA]
A segment; any encircling or beltlike structure, either external or internal, longitudinal or transverse.
See also: area, band, region, space, spot.
Synonym(s): zona (1) [TA]
[L. zona]

zone

(zōn) an encircling region or area; by extension, any area with specific characteristics or boundary.zo´nal
ciliary zone  the outer of the two regions into which the anterior surface of the iris is divided by the collarette.
comfort zone  an environmental temperature between 13° and 21°C (55°–70°F) with a humidity of 30 to 55 per cent.
epileptogenic zone  see under focus.
erogenous zone , erotogenic zone an area of the body whose stimulation produces erotic excitation.
inner zone of renal medulla  the part of the medulla farthest in from the cortex, containing ascending and descending limbs of the thin tubule as well as the inner part of the medullary collecting duct.
Lissauer's marginal zone  a bridge of white substance between the apex of the posterior horn and the periphery of the spinal cord.
outer zone of renal medulla  the part of the medulla nearest to the cortex; containing the medullary part of the distal straight tubule as well as the outer part of the medullary collecting duct.
zone of partial preservation  in spinal cord injury, a region where there may be only partial damage to nerves, including one to three spinal segments below the level of the injury.
pellucid zone  zona pellucida.
pupillary zone  the inner of the two regions into which the anterior surface of the iris is divided by the collarette.
transitional zone  any anatomical region that marks the point at which the constituents of a structure change from one type to another.

zone

Etymology: Gk, belt
an area with specific boundaries and characteristics, such as the epigastric, mesogastric, and hypogastric zones of the abdomen or the breasts, lips, or genitals. See also zona.
Environment See Zone of Alienation
Sports medicine
(1) A popular term used by some athletes for heart rates—zones—that reflect the intensity of a workout or exercise routine
(2) A popular term for a state of maximum physical, mental and psychological performance (‘the zone’)
Vox populi A place, area or region with specified boundaries

zone

(zōn) [TA]
A segment; any encircling or beltlike structure, either external or internal, longitudinal or transverse.
See also: area, band, region, space, spot
Synonym(s): zona (1) .
[L. zona]

zone

any division or specific area. See SEA ZONATION, ZONATION.

zone

specific body area

zone

(zōn) [TA]
A segment; any encircling or beltlike structure, either external or internal, longitudinal or transverse.
[L. zona]

zone (zōn),

n a region or area with specific characteristics or boundary.
zone, incubation,
n an area that provides a favorable environment for growth of microorganisms and is thus conducive to initiation or perpetuation of a pathologic process (e.g., gingival flap over a partly erupted third molar).
zone, neutral,
n the potential space between the lips and cheeks on one side and the tongue on the other. Natural or artificial teeth in this zone are subject to equal and opposite forces from the surrounding musculature.
zone of reference,
n the area of perceived pain referred by a trigger point. See also trigger point.
zone, subsurface,
n the area of the tooth lying immediately below the outer covering of enamel; usually an area affected initially by caries.

zone

an encircling region or area; by extension, any area with specific characteristics or boundary. See also zona.

autonomous innervation zone
areas of innervation supplied by a single nerve, as for example the patch of skin on the medial side of the horse fore pastern which is supplied solely by the median nerve; used to assess the integrity of individual nerves.
ciliary zone
the outer of the two regions into which the anterior surface of the iris is divided by the angular line.
comfort zone
an environmental temperature between 55° and 70° F (13° and 21° C) with a humidity of 30 to 55%.
epileptogenic zone
an area, stimulation of which may provoke an epileptic seizure.
zone of inhibition
the area without bacterial growth surrounding an antimicrobial-impregnated disk in an antimicrobial sensitivity test.
provisional calcification zone
in developing bone longitudinal tubes of mineralized matrix which surround hypertrophic chondrocytes.
transitional zone
the circle in the equator of the lens of the eye in which epithelial fibers are developed into lens fibers.
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