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1. A tight closure.
2. To effect a tight closure.


Heart surgery A clinical trial–Simple & Effective Arterial Closure Study which evaluated the safety and efficacy of the Duett vascular sealing device


Public health Any air- and/or water-tight closure on a product–blood components, medications intended to maintain a product sterilely until used by a consumer; products with broken seals should be discarded

staining, fluorescein 

The artificial coloration of tissue by fluorescein. Under ultraviolet illumination, it stains dead or degenerated corneal epithelial cells due to abrasions, old age or following inadequate contact lens fit, a yellowish-green colour. It also stains the tears, thus facilitating the evaluation of tear drainage or the blood flow through the retina and choroid when injected intravenously. Corneal staining resulting from contact lens wear may present in various shapes, locations, depths or severity. A very common form is punctate staining as appears in punctate epithelial keratitis. There may be arcuate stains located in different parts of the cornea, some inferiorly (called inferior epithelial arcuate lesions) or superiorly (called superior epithelial arcuate lesions, acronym: SEAL, or epithelial splitting), which usually do not give rise to symptoms and appear mainly with soft or silicone hydrogel lenses. A very severe form of staining is called epithelial plug. It is typically round in shape and represents a loss of the full thickness of the epithelium. Corneal staining resulting from contact lens wear typically disappears after cessation of contact lens wear. See fluorescein angiography; dye dilution test; fluorescein test.


1. Tight closure.
2. To effect a tight closure.


n 1. something that firmly closes or secures.
2. a tight and perfect closure.
v 3. to keep shut, enclosed, or confined.
seal, border,
seal, double,
n a seal consisting of gutta-percha underneath another material such as temporary cement; used to close the coronal opening in a tooth during endodontic treatment.
seal, hermetic,
n perfect and absolute obliteration of all space within a tooth.
seal, peripheral,
seal, posterior palatal,
n the seal at the posterior border of a denture produced by displacing some of the soft tissue covering the palate by extra pressure developed in the impression or by scraping a groove along the posterior seal area in the cast on which the denture is to be processed.
seal, postpalatal,
n See seal, posterior palatal.


1. a marine mammal; member of the suborder Pinnipedia. There are two major groups, the earless seals (family Phocidae) including many species, and the eared seals (family Otariidae) including sealions and fur seals. They are carnivorous and have four paddles which enable them to move on land and to swim.
2. a very dark brown coat color of cats, seen in brown (or sable) Burmese and on the extremities of seal-point Siamese and Colorpoint cats.

seal pox
see sealpox.

Patient discussion about seal


A. honey has an antimicrobial activity due to it's acidity, osmotic power and hydrogen peroxide. about MRSA - there is a New Zealandic research about a type of honey that is effective against infections of MRSA. but it's only one research and another investigation is required.

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References in periodicals archive ?
The exhibition portfolio includes dynamic sealing systems (mechanical face seals, shaft seals, hydraulic and pneumatic seals), chemically engineered seals, static seals made of various materials in a variety of variants, adhesive and sealing systems, liquid gaskets, sealing strips, molded parts, diaphragms, bellows and profiles.
Induction heating power supplies and work-handling systems for bonding, and induction cap-sealing systems for hermetically sealing foil laminate membranes to plastic and glass containers.
A range of sample shapes was molded to evaluate the effect of different configurations and potential constraints, and to note how these responses might also affect their viscoelastic response and tests used to measure their sealing capability.
An adjusted setting of the contact force of the dust stops is a significant factor concerning the wear sealing rings, in phases of strong dust stop loads, it is very important to keep the sealing closed.
Due to the fact that the sealing cross-section is shifted inwards to the mixing chamber, the pasting takes place in the axial gap between the rotor and the wear plate.
High-frequency dielectric heat-sealing equipment from 1 to 100 kw for welding, heat sealing, embossing, and die cutting supported and unsupported vinyls.
According to Jesse Fordyce, Market Manager at John Crane, the industry has long sought a better solution for corrosion-resistant high-temperature sealing applications because today's refineries are using sour crude that is high in sulfur content.
Note though that sealing lines on the dynamic seal am not compressing equally, as only the plastic housing was addressed in this study.
Laser cutting, sealing, welding, slitting, micro-drilling, high-speed etching, marking, barcoding, removing selective materials, and kiss cutting.
The basics of pressure rotary joints A pressure rotary joint consists of one or two carbon bearings, a carbon graphite seal with a spherical sealing face and a spring that keeps the seals together at zero pressure (figure 2).
Thermo-contact welding, high-frequency (RF) sealing, and combination RF/contact sealing for sealing a wide range of plastics.
The 2006 Fel-Pro(R) Performance Gaskets Catalog is now available featuring significantly expanded coverage of Fel-Pro PermaTorqueMLS(R) performance head gaskets and other exclusive sealing solutions for today's professional and sportsman racing engines and high-output street performance applications.