What is a pixel?
"picture element" is actually a short term of the "pixel". These tiny dots make up the image on computer screens, whether they're flat panel displays (LCDs) or cathode ray tubes (CRTs). A matrix of thousands or even millions of pixels is divided that is present on the screen of the monitor. Normally you don't see individual pixels because they are so small. This is good because most people prefer to see crisp, clean images over blocky "pixelated" images.