orthogenesis[ôr′t̸hō jen′ə sis]
orthogenesis definition by Webster's New World
- 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- and amp; -genesis
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
- orthogenetic adjective
orthogenesis definition by American Heritage Dictionary
- 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