Attributive Used with reference to various concepts relating to the measurement of physical properties of rubber and other elastic solids, and instruments employed in such measurement; "Mooney material"noun a material (such as rubber) whose behaviour under large elastic deformation approximates to that of an ideal, perfectly elastic material which is isotropic and incompressible. "Mooney viscometer"noun a type of viscometer for measuring the viscosity of unvulcanized rubber.