pixel
Information unit
| Name | Symbol | Quantity | Expressed in terms of SI base units | |
| pixel | px | picture element |  |
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DefinitionThe pixel, symbol px, is the unit of digital image information. A pixel, or picture element, is the smallest addressable element in a bitmap or raster image. |
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The unit name “pixel” is a portmanteau word formed from “pix” (picture) and “el” (element).
Metric System 