orthogenesis


or·tho·gen·e·sis

noun \ˌr-thə-ˈje-nə-səs\

Definition of ORTHOGENESIS

:  variation of organisms in successive generations that in some especially former evolutionary theories takes place in some predestined direction resulting in progressive evolutionary trends independent of external factors
or·tho·ge·net·ic \-jə-ˈne-tik\ adjective
or·tho·ge·net·i·cal·ly \-ti-k(ə-)lē\ adverb

Origin of ORTHOGENESIS

New Latin
First Known Use: 1895

or·tho·gen·e·sis

noun \ˌr-thə-ˈjen-ə-səs\   (Medical Dictionary)
plural or·tho·gen·e·ses \-ˌsēz\

Medical Definition of ORTHOGENESIS

: variation of organisms in successive generations that in some evolutionary theories takes place in some predestined direction and results in progressive evolutionary trends independent of external factors
or·tho·ge·net·ic \-jə-ˈnet-ik\ adjective

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