mean-square unperturbed radius of gyration

symbol: $\lt\!s_{\rm{o}}^{2}\!\gt$; units: $\pu{nm2}$, $\pu{m2}$
https://doi.org/10.1351/goldbook.12194
Mean-square radius of gyration of a macromolecule having unperturbed dimensions.
Source:
PAC, 2015, 87, 71. (Definitions of terms relating to individual macromolecules, macromolecular assemblies, polymer solutions, and amorphous bulk polymers (IUPAC Recommendations 2014)) on page 75 [Terms] [Paper]