The dual nature of polymers, partly viscous fluid and partly elastic solid, is referred to as viscoelasticity. In flowing polymers viscoelasticity is responsible for time-dependent properties, such as [..]

Property of a material which is viscous but which also exhibits certain elastic properties such as the ability to store energy of deformation, and in which the application of a stress gives rise to a strain (or vice versa) that approaches its equilibrium value over a significant time interval. Viscoelastic materials can’t be accurately described us [..]

(physics) The property of a material that is both viscous and elastic (physics) The branch of rheology that studies such materials