Madelung's disease is a disorder of fat metabolism (lipid storage) that results in an unusual accumulation of fat deposits around the neck and shoulder areas.
Iteration is the act of repeating a process with the aim of approaching a desired goal, target or result. Each repetition of the process is also called an iteration, and the results of one iteration are used as the starting point for the next iteration. The pentagon on the right also is a good example of how iteration relates to recursion.
Definition of iteration. 1 :  the action or a process of iterating or repeating: such asa : a procedure in which repetition of a sequence of operations yields results successively closer to a desired resultb : the repetition of a sequence of computer instructions a specified number of times or until a condition is met â compare recursion.