Constitutional repeating unit connected to only one other constitutional repeating unit.
Note: A terminal constitutional repeating unit may be connected to one or more end-groups.
See: hyperbranched macromolecule (figure), dendron (figure)
Source:
PAC, 2019, 91, 523. 'Nomenclature and terminology for dendrimers with regular dendrons and for hyperbranched polymers (IUPAC Recommendations 2017)' on page 535 (https://doi.org/10.1515/pac-2016-1217)