Quantcast
Merriam-Webster Logo
  • Dictionary
  • Thesaurus
  • Scrabble
  • Spanish Central
  • Learner's Dictionary

orthogenesis

play
noun or·tho·gen·e·sis \ˌȯr-thə-ˈje-nə-səs\

Definition of orthogenesis

  1. :  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

orthogenetic

play \-jə-ˈne-tik\ adjective

orthogenetically

play \-ti-k(ə-)lē\ adverb


Origin and Etymology of orthogenesis

New Latin


First Known Use: 1895


Medical Dictionary

orthogenesis

play
noun or·tho·gen·e·sis \ˌȯr-thə-ˈjen-ə-səs\

Medical Definition of orthogenesis

plural

orthogeneses

\-ˌsēz\play
  1. :  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

orthogenetic

\-jə-ˈnet-ik\play adjective



Learn More about orthogenesis


Seen and Heard

What made you want to look up orthogenesis? Please tell us where you read or heard it (including the quote, if possible).