Noun
radius of gyration (plural radii of gyration)
(physics, engineering) Given a body B, the distance from a given axis of rotation at which a point mass of the same mass as B would have the same moment of inertia about said axis.
Mathematically the radius of gyration is the root mean square distance of the object's parts from either its center of mass or a given axis, depending on the relevant application. Source: Internet
The radius of gyration for this case is given by : Note that although represents the contour length of the polymer, is strongly dependent of polymer stiffness and can vary over orders of magnitude. Source: Internet
The radius of gyration is given by the following formula: : or : Where I is the second moment of area and A is the total cross-sectional area. Source: Internet