The number of horizontal ... pixels and 1,200 vertical pixels (see high-definition resolutions). Screen resolutions also have base names, such as HDTV and Ultra UHD for TVs and XGA and WQXGA for ...

The pixels per inch of a display is what's referred to as the pixel density or PPI. It's a measure of how many pixels you would count if you counted the pixels, horizontal or vertical, that exist ...