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noun. a person or thing that scans.; optical scanner. See under optical scanning.; Photography. any device for exposing an image on film, a sensitized plate, etc., by tracing light along a series of many closely spaced parallel lines.


Scanners come in hand-held, feed-in, and flatbed types and for scanning black-and-white only, or color. Very high resolution scanners are used for scanning for high-resolution printing, but lower resolution scanners are adequate for capturing images for computer display.


Medical Definition of scan (Entry 2 of 2) 1 : the act or process of scanning 2 a : a depiction (as a photograph) of the distribution of a radioactive material in something (as a bodily organ)


a visual examination by means of a television camera, as for the purpose of making visible or relaying pictures from a remote place: a satellite scan of the dark side of the moon; video scans of property listings available to customers.


Some scanners, however, can be hooked to a campus network, capturing data on a user from an initial interaction, then sending that data to a central database that runs the comparison, grants or denies access, and returns a red- or greenlight message back to the scanner itself.


Define scan. scan synonyms, scan pronunciation, scan translation, English dictionary definition of scan. v. scanned , scan·ning , scans v. tr. 1. a. To look at carefully or thoroughly, especially in search of something; examine: The sailor scanned the horizon...


PET scan listen (… skan) A procedure in which a small amount of radioactive glucose (sugar) is injected into a vein, and a scanner is used to make detailed, computerized pictures of areas inside the body where the glucose is taken up.


An image scanner—often abbreviated to just scanner, although the term is ambiguous out of context (barcode scanner, CT scanner etc.)—is a device that optically scans images, printed text, handwriting or an object and converts it to a digital image.


Medical Definition of scanner : a device (as a CT scanner) for making scans of a living body. Keep scrolling for more. More from Merriam-Webster on scanner. Rhyming Dictionary: Words that rhyme with scanner. Spanish Central: Translation of scanner. Nglish: Translation of scanner for Spanish Speakers.


A scanner may refer to any of the following:. 1. When referring to hardware, a scanner or optical scanner is a hardware input device that optically "reads" and image and converts it into a digital signal. For example, a scanner may be used to convert a printed picture, drawing, or document into a digital file which can be edited on a computer.The picture shows an example of a flatbed sca...