phylogeny UK /faɪˈlɒd͡ʒəni/US /faɪˈlɑd͡ʒəni/ noun4 •The evolutionary history of groups of organisms, such as species or clades.It was a bestiary more than a hundred years old, its entries organised by a quaintly outdated phylogeny and illustrated with hand-tinted plates. — 2022 •The historical development of a human social or racial group.Understanding the phylogeny of this musical group helps us understand its music. •The historical development of any thing, idea, etc.Indeed, in a recent review article, Mithen (2009) traces the phylogeny of human communication […] — 2010 •A phylogenetic diagram. formsphylogenies