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Definition of Yield stress
1. Noun. A critical value of shear stress, below which a plastic or viscoplastic material behaves like a solid; above this value, a plastic material deforms and a viscoplastic material flows. ¹
¹ Source: wiktionary.com
Medical Definition of Yield stress
1. The critical stress that must be applied to a material before it begins to flow, as in a Bingham plastic. (05 Mar 2000)