loose end

https://doi.org/10.1351/goldbook.L03625
Polymer chain within a @NT07562@ which is connected by a junction-point at one end only.
Source:
PAC, 2007, 79, 1801. (Definitions of terms relating to the structure and processing of sols, gels, networks, and inorganic-organic hybrid materials (IUPAC Recommendations 2007)) on page 1820 [Terms] [Paper]