orthogenesis[ôr′t̸hō jen′ə sis]
- Biol. a now discredited theory that states that the progressive evolution of certain organisms in a restricted direction throughout successive generations is independent of outside influences and natural selection
- Anthrop. the theory, no longer accepted, that every culture follows the same fixed course of evolution, uninfluenced by differing environmental factors
Origin: ModL: see ortho- & -genesis
- orthogenetic adjective
Used by arrangement with John Wiley & Sons, Inc.
- Biology The theory that the evolution of a species is influenced most strongly by internal factors and is not subject to the external forces of natural selection.
- The theory that all cultures pass through sequential periods in the same order.
- orˌtho·ge·netˈic adjective
- orˌtho·ge·netˈi·cal·ly adverb