equivalent hydrodynamic volume

https://doi.org/10.1351/goldbook.12257
Volume of the hydrodynamically equivalent sphere.
Note: The molar equivalent hydrodynamic volume determined using measurements of intrinsic viscosity, \([\eta]\), is \(V_{\eta}\), where \(V_{\eta} = [\eta]M/N_{\rm{A}}\), with \(M\) the molar mass and \(N_{\rm{A}}\) the Avogadro constant.
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 103 [Terms] [Paper]