(*uncountable*)

From Greek syn=together, tropos=tendency. It was first coined by the mathematician Luigi Fantappiè, in 1941, in order to describe the mathematical properties of the advanced waves solution of the Klein-Gordon equation which unites Quantum Mechanics with Special Relativity. As noted by Viterbo, syntropy is "the tendency towards energy concentration, order, organization and life" (http://www.syntropy.org/). In contradistinction to "entropy," syntropy is a result of retrocausality leading to persistent and more complex organization. This is akin to the concept of dissipative structures developed by Ilya Prigogine, expostulated in *Order Out of Chaos*, by Prigogine & Stengers (1984). Buckminster Fuller developed a definition in relation to "whole systems" as "A tendency towards order and symmetrical combinations, designs of ever more advantageous and orderly patterns. Evolutionary cooperation. Anti-entropy" (http://psychology.wikia.com/wiki/Syntropy).

- (pathology) The coalescence of two diseases into one
- (psychology) A wholesome association with others
- (anatomy) A formation of a series of similar parts having the same orientation (such as the ribs)