What is the definition of Orthogenesis? | Dictionary.net

ORTHOGENESIS

\ˌɔːθə͡ʊd͡ʒˈɛnɪsˌɪs], \ˌɔːθə‍ʊd‍ʒˈɛnɪsˌɪs], \ˌɔː_θ_əʊ_dʒ_ˈɛ_n_ɪ_s_ˌɪ_s]\

Definitions of ORTHOGENESIS

1920 - A dictionary of scientific terms.
1920 - A dictionary of scientific terms (6th edition)
1919 - The concise Oxford dictionary of current English

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Variation which, irrespective of natural selection or external forces, gradually produces a new and distinct type.

1920 - A dictionary of scientific terms.
By Henderson, I. F.; Henderson, W. D.

[Greek] Variation which, irrespective of natural selection or external forces, gradually produces a new and distinct type (biol.).

1920 - A dictionary of scientific terms (6th edition)
By J.H. Kenneth

A view of evolution according to which variations follow a defined direction& are not merely sporadic& fortuitous.

1919 - The concise Oxford dictionary of current English
By Sir Augustus Henry

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