系けい統とう樹じゅ

noun

phylogenetic tree; evolutionary tree; dendrogram

Technical term used in biology, linguistics, and other fields to show evolutionary or genealogical relationships in a branching diagram. Also used metaphorically for any branching classification.

• この系けい統とう樹じゅは、哺ほ乳にゅう類るいの進しん化かの道みち筋すじを示しめしている。

  This phylogenetic tree shows the evolutionary path of mammals.

• 言げん語ごの系けい統とう樹じゅを描えがくと、共きょう通つうの祖そ先せんがわかる。

  Drawing a family tree of languages reveals their common ancestor.