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
Definition of spline. 1  1 : a thin wood or metal strip used in building construction. 2  2 : a key that is fixed to one of two connected mechanical parts and fits into a keyway in the other; also : a keyway for such a key.