1 If the black lines aren't visible on the external screen, the laptop screen may need to be replaced. 2  If the black lines are also visible on the external screen, the video card or motherboard may need to be replaced. 3  In some cases, a loose video card can cause problems with the monitor video.
1. segmentation - (embryology) the repeated division of a fertilised ovum. cleavage. embryology-the branch of biology that studies the formation and early development of living organisms. cell division, cellular division-the process in reproduction and growth by which a cell divides to form daughter cells.
Â© A Dictionary of Zoology 1999, originally published by Oxford University Press 1999. metameric segmentation The repetition of organs and tissues at intervals along the body of an animal, thus dividing the body into a linear series of similar parts or segments (metameres). It is most strikingly seen in Annelida. A Dictionary of Biology 2004, originally published by Oxford University Press 2004. metameric segmentation (metamerism; segmentation) The division of an animal's body (except at the head region â see cephalization) into a number of compartments (segments or metameres) each containing the same organs.