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mir·ror

(mir'ŏr),
A polished surface reflecting the rays of light reflected from objects in front of it.
[Fr. miroir, fr. L. miror, to wonder at]

mirror

/mir·ror/ (mir´er) a polished surface that reflects sufficient light to yield images of objects in front of it.
dental mirror  mouth m.
frontal mirror , head mirror a circular mirror strapped to the head of the examiner, used to reflect light into a cavity, especially the nose, pharynx, or larynx.
mouth mirror  a small mirror attached at an angle to a handle, for use in dentistry.
noun An archiving device written to more than one hard disk simultaneously, so that if one disk fails, the computer continues to function without loss of data
verb To maintain an exact copy of a file or database

mirror

Informatics noun An archiving device written to more than one hard disk simultaneously, so that if one disk fails, the computer continues to function without loss of data verb To maintain an exact copy of a file or database. See FTP, Web Paranormal See Mind mirror.

mir·ror

(mir'ŏr)
A polished surface reflecting the rays of light reflected from objects in front of it.

mirror

A surface capable of reflecting light rays and forming optical images. Such surfaces are smooth or polished, made of highly polished metal, or a thin film of metal (e.g. aluminium) on glass, quartz or plastic. Object distance l and image distance l′ relate to the focal distance f or the radius of curvature r of the mirror, as follows
2/r represents the refractive power of the mirror, in air. If the medium that contains the incident and reflected rays is n, the power becomes F = 2n/r and the focal length, f = r/2n (Fig. M12). See focal length; fundamental paraxial equation; catadioptric system.
back surface mirror A mirror which reflects from the back surface of a refracting layer, usually glass. See front surface mirror.
concave mirror A mirror with a spherical concave surface forming an erect, magnified, virtual image when the distance from the mirror is less than the focal distance and an inverted real image when the object distance is greater than the focal distance (Fig. M12).
convex mirror A mirror with a spherical convex surface forming a virtual, erect and diminished image (Fig. M12).
front surface mirror A mirror that reflects directly from its front surface. The advantages of this type are that, unlike back surface mirrors, there is no chromatic effect as the glass is not used optically, therefore ultraviolet rays can be used which would otherwise be absorbed in the glass and there is no ghost reflection from the front surface. However, these mirrors can be easily scratched and the coating may tarnish. Often a coating of silicon monoxide is evaporated on top of the surface, but this causes a loss of reflectivity. See ghost image; back surface mirror.
plane mirror A mirror whose surface is plane and forms a virtual image of the same size as the object. Object and image distances are equal.
semi-silvered mirror See beam splitter.
mirror writing Writing backward, Latin letters being written from right to left and the details of the letters reversed. The writing thus appears normal when viewed in a mirror. Syn. retrography.
Fig. M12 Image of an object O formed in A, a concave mirror and B, a convex mirror. Four rays are drawn in each case for completeness, but two would suffice (C, centre of curvature; F ′, focal point; f ′, focal length; l and l ′, object and image length; r , radius of curvature)enlarge picture
Fig. M12 Image of an object O formed in A, a concave mirror and B, a convex mirror. Four rays are drawn in each case for completeness, but two would suffice (C, centre of curvature; F′, focal point; f′, focal length; l and l′, object and image length; r, radius of curvature)

mir·ror

(mir'ŏr)
A polished surface reflecting the rays of light reflected from objects in front of it; particularly useful in visualizing structures in the oral cavity.
References in periodicals archive ?
To see the current mirror sites, click on the Our Network link at the very bottom of the page.
Five mirror sites are identified on a map: AltaVista Canada, AltaVista Australia, AltaVista Asiawide, AltaVista Southern Europe, and AltaVista Latin America.
Having compared the mirror sites several times over the past several weeks, it appears that all except AltaVista Magallanes are using identical databases-at least at this point in time.
Most of today's web sites are the product of the collective efforts of several suppliers, who provide web hosting, content delivery, mirror sites, database servers, certificate servers, credit card authorization, advertising servers and other emerging technologies from ISPs and Application Service Providers (ASPs).
Web authors publish their files to the WebAgain Server where it archives the content and publishes the pages to the company's public web sites and any associated mirror sites.
The judge said he wanted time to examine the scope of the permanent injunction as it applied to mirror sites.
It lets e-businesses deploy their Web content in new markets without the costly complexities of setting up mirror sites.
One was the original Web site, owned and maintained by NASA on NASA property; the other was one of several mirror sites owned and operated by Adero as part of AderoWorld Service.
Users can access the sites directly through Aceweb Internet's servers or from mirror sites located in the United States and around the world.
Resonate software is responsible for monitoring all of the multiple mirror sites and will immediately direct traffic to the most appropriate, available site to prevent the slow delivery of content and potential site outages.
Resonate Global Dispatch is used to automatically direct users to primary corporate mirror sites which may be accessed by following URLs:
In the virtual store, you have the luxury of building out your site to accommodate more people through mirror sites and redundant servers.