trifunctional

From tri- +‎ functional.

trifunctional (not comparable)

1. Having three functions
2. (organic chemistry) Having three functional groups
   • 1997, Hatada, Macromolecular Design of Polymeric Materials, →ISBN, page 45:

     Sequential living polymerizations of hydrophilic and hydrophobic vinyl ethers from these trifunctional initiators give amphiphilic triarmed block copolymers where the hydrophilic segments may be placed either inner or outer layer of the three arms.