A shortening of picture (shortened in Hollywood parlance to “pix”) and element. A pixel is a single point in a raster or bitmap image and thus the smallest adjustable point of an image. An image, such as a digital photograph, is made up of thousands of individual pixels, each one a different color. As this grid of squares becomes smaller, the image becomes clearer and sharper. Thus an image that has 300 pixels per inch is much sharper than an image that has only 72 pixels per inch.