telodendrion

noun

telo·​den·​dri·​on ˌtel-ə-ˈden-drē-ən 

variants also teledendron or telodendron

-ˈden-drən 

plural telodendria -drē-ə  also teledendra or telodendra -drə 

: the terminal arborization of a nerve fiber

—used originally of dendrites but now especially of the main arborization of an axon