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shear modulus[′shir ‚mäj·ə·ləs]
(or rigidity modulus), a quantity characterizing shearing deformation. It is equal to the ratio of the shearing stress τ and the shearing angle γ (shearing strain). (See alsoMODULI OF ELASTICITY.)
modulus of rigidity, modulus of shear
In an elastic material which has been subjected to stress, the ratio of the shearing stress to the shearing strain.