dendrimer
(ˈdɛndrəmə) na type of polymer defined by regular branches from a central monomer, which give it a tree-like molecular structure
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014