Pixel density
SCREEN RESOLUTION MEASURED IN PIXELS PER LENGTH
Pixels per inch; Pixel densities; HiDPI; XHDPI; HDPI; Display density; Pixels per centimetre; Pixels per centimeter
Pixels per inch (ppi) and pixels per centimetre (ppcm or pixels/cm) are measurements of the pixel density of an electronic image device, such as a computer monitor or television display, or image digitizing device such as a camera or image scanner. Horizontal and vertical density are usually the same, as most devices have square pixels, but differ on devices that have non-square pixels.