orthogenèsecommon nounSyllable DecompositionorthogenèseEtymologyexpandword see ortho- and genesis.Definition1. Theory that the evolution of a species follows a regular, immutable law, unrelated to utility, and therefore cannot be subject to Darwinian selection.biologieexpandPluralorthogenèsesTranslationsenglish:orthogenesisSee alsoorthogénétique (adj.)