Noun
(thermodynamics) The difference between the entropy of a system and the maximum possible entropy of the same system. [from 1950s]
(information theory) The difference between the entropy of a probability distribution and the maximum possible entropy of the same probability distribution.
Source: en.wiktionary.orgBoth the uncertainty principle and the negentropy principle of information make Laplace's scheme [of exact determinism] completely unrealistic. The problem is an artificial one; it belongs to imaginative poetry, not to experimental science. Léon Brillouin