transitional zone


Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia.

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.

tran·si·tion·al zone

1. the equatorial region of the lens of the eye where the anterior epithelial cells become transformed into lens fibers;
2. that portion of a scleral contact lens between the corneal and scleral sections.

transitional zone

Etymology: L, transire, to go through; Gk, zone, belt
a part of the crystalline lens of the eye where epithelial-capsule cells change into lens fibers.

tran·si·tion·al zone

(tran-zish'ŭn-ăl zōn)
1. The equatorial region of the lens of the eye where the anterior epithelial cells become transformed into lens fibers.
2. That portion of a scleral contact lens between the corneal and scleral sections.

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.
References in periodicals archive ?
Similar limestones of the Ragavere and Montu formations in the transitional zone (Ristikula section) and in the northern part of the Livonian Tongue (Valga section) contain up to 20% i.
This finding may represent transitional zone extension to the proximal surgical margin.
Because the transitional zone -- the space between the sidewall and wheel on traditional tires -- is eliminated, smaller tires can be utilized for vehicle design.
The combined area of approximately 154,000 acres is located in the shallow-water transitional zone of China's Bohai Bay.
This spectacular transitional zone in the ocean, where the outer reef ends and the open sea begins, is where large patrolling sharks suddenly appear out of the blue abyss.
To support this, the company has recently broadened its primary focus on ground seismic acquisition for exploration and production to marine seismic and transitional zones.
Some epithelial cancers are known to occur in transitional zones between two types of epithelium (layers of tissue that line the body and organs and form glands), while others originate in epithelial tissue stem cells.
After all, being a community entails having boundaries of some sort, whether they take the form of walls or transitional zones between one community and another.
The property is in one of the transitional zones, and Brandon decided to sell it for $190,000 to a group of investors put together by Maury Mitchell of Little Rock.
One RC rig on single shift drilling pre-collars in oxide and transitional zones.
Regularities of chemical composition and structure change of transitional zones metal-ceramics of deposited gradient coatings as a function of the deposition process technological parameters are studied.
Existing GSM 900 MHz infrastructure can introduce interference into UMTS 900 MHz networks, so guard band and transitional zones may be needed;