- A scanning system, such as that used in TVs and some computer monitors, in which the electron beam traces all odd-numbered lines followed by the tracing of all even-numbered lines. The pattern created by tracing the even-numbered lines is called the even field, while the pattern created by tracing the odd-numbered lines is called the odd field. A complete displayed frame consists of both of these interlaced fields. For a given refresh rate, image flicker is less apparent than that of a non-interlaced display. Also called line interlace, interlaced scanning, or interlacing.