I am assuming you mean a complicated distribution or dispersion of something which cannot easily be related to its source, or traced back to a cause. This would normally be related to laws or principles through the use of statistical methods.
Dear Professors, many thanx for the clarifications. Conservation of properties are rather the exception than conversion of entities, and principles which are formulated as equalities most of the time reflect the highest attainable (Energy, Power, Interaction) etc. however also there are discontinuous phenomena. Can energy jump for an example or is it a mere idealization ?