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shear modulus

noun Physics.
  1. a coefficient of elasticity of a substance, expressing the ratio between the force per unit area (shearing stress) that laterally deforms the substance and the shear (shearing strain) that is produced by this force.
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Also called modulus of rigidity, modulus of torsion, torsion modulus.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
modulus of torsion in Science

shear modulus

  1. See under modulus of elasticity.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.