A unit of screen measurement equal to 1/20 of a printers point.  There are approximately 1440 twips to a logical inch or 567 twips to a logical centimeter the length of a screen item measuring one inch or one centimeter when printed.  A twip is a screen-independent unit used to ensure that placement and proportion of screen elements in your screen application are the same on all display systems.  Contrast with pixel, a screen-dependent unit of measurement.