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| Refers to using existing techniques involving flexible grid layout, flexible images, and media and media queries into a unified approach to web design. |
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| A simple count of the number of pixels across the entire width and height of a device. |
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| A measure of screen density refers to the number of device pixels on a physical surface. |
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| The tiniest physical unit in a display; also known as a physical pixel. |
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| The smallest unit of data in a raster image. |
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| A W3C standard based on an optical reference unit that might be twice the size of a hardware pixel. This new pixel should look exactly the same in all viewing situations. |
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| The number of device pixels on a physical surface; often measured in pixels per inch. |
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| The rectangular area (measured in pixels) that is viewable ona device screen. |
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| The width of the site is bound to a certain number of pixels. |
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| The web design's dimensions are defined in percentages rather than pixels. |
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| 1 em equals the current font size; in a Web browser it equals 16 px. |
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| Size is set in relation to surrounding elements. |
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| A CSS specification that allows designers to target styles based on a number of device properties. |
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| Scalable Vector Graphics (SVG) |
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| Defines vector-based graphics that can be embedded directly into a Web page; SVG is a World Wide Web Consortium recommendation. |
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