- 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 of orthogenesisModL: see ortho- and -genesis
- Biology The hypothesis, now largely discredited, that the evolution of species is linear and driven largely by internal factors rather than by natural selection.
- Anthropology The hypothesis that all cultures evolve in a linear manner from primitivism to civilization.
ortho- +"Ž -genesis