Home › Words › X › xenogeneticsxenogeneticsxenogenetics · noun — A fictional science, concerned with the study of genetic makeup of extraterrestrial species.Definition from Wiktionary (CC BY-SA 3.0).EtymologyFrom xeno- + genetics.nounA fictional science, concerned with the study of genetic makeup of extraterrestrial species.Definitions & examples from Wiktionary (CC BY-SA 3.0).