The term<unk>  refers to a biological factor, typically a growth factor or other protein, that causes a developing biological cell or tissue to branch in a tree-like manner.
The term was first coined (from the Latin ramus = branch and the Greek  genesis = creation) in an article about kidney development by Davies and Davey (Pediatr Nephrol. 1999 Aug;13(6):535-41), and has now passed into general use in the technical literature concerned with branching of biological structures.
Ramogen
Icterogenin
Tyrothricin
Testolactone
Apronal
Triptans
Epoophoron
Psilocin