ortho-genesis

orthogenesis

[awr-thuh-jen-uh-sis]
noun
1.
Biology.
a.
Also called orthoselection. evolution of a species proceeding by continuous structural changes in a single lineage without presenting a branching pattern of descent.
b.
a theory that the evolution of a species in a continuous, nonbranching manner is due to a predetermined series of alterations intrinsic to the species and not subject to natural selection.
2.
Sociology. a hypothetical parallelism between the stages through which every culture necessarily passes, in spite of secondary conditioning factors.

Origin:
1890–95; < Neo-Latin; see ortho-, genesis

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World English Dictionary
orthogenesis (ˌɔːθəʊˈdʒɛnɪsɪs)
 
n
1.  biology
 a.  evolution of a group of organisms predetermined to occur in a particular direction
 b.  the theory that proposes such a development
2.  the theory that there is a series of stages through which all cultures pass in the same order
 
orthogenetic
 
adj
 
orthoge'netically
 
adv

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