an·a·gen·e·sis I. \ˌanəˈ-\noun (pluralanageneses) Etymology: New Latin, from ana- + Latin genesis : reproduction, regeneration < anagenesis of tissue > • an·a·ge·net·ic\|anə ̷ ̷| ̷ ̷ ̷ ̷\adjective II. noun : evolutionary change within a single lineage in which one group replaces another without branching into distinct forms — compare cladogenesis herein • anageneticadjective • ana·ge·net·i·cal·ly\¦anəjə̇¦ned.ə̇k(ə)lē\adverb