It is used during daylight hours. The balloon is filled to such degree that its ascent rate is known. By measuring the time period between the start of the balloon and the moment it hides in the cloud can be determined the height of the cloud base.
imbrication lines (imâ³bro brÃ´Â´ika shÉn) , lÄ«nz.n pl. 1 the seams which are formed by overlapping layers of tissue in order to close a surgical. wound. 2 slight mesiodistal ridges in the cervical third of a. tooth
Lines of incision made parallel to them are thought to heal more efficiently. Called also cleavage lines. lead line a purple-blue line at the edge of the gums in chronic lead poisoning; called also blue line. lip line a line on the teeth at the level to which the margin of either lip extends. median line an imaginary vertical line dividing the body equally into right and left parts. milk line the line of thickened epithelium in the embryo along which the mammary glands are developed.