In life thermodynamics, ektropy refers to the energetics related to morphic order or generating order or form in ordinary space. [1] The term was introduced in 1900 by German writer Georg Hirth to be antonym to entropy in the case of living structures. [2] The English variant is ectropy.

References
1. Wittbecker, Alan. (2006). Good Forestry: From Good Theories and Good Practices (keyword: ektropy). 3 Muses Books.
2. Hirth, George. (1900). Entropie der Keimsysteme und erbliche Entlastung (Entropy of Germ Systems and Hereditary Discharge). Munich: G. Hirth’s Verlag.