a measure of wood deformation under an applied load equal to the ratio of stress to strain within the elastic range (when strain is proportional to the applied stress) —note modulus of elasticity is an indication of stiffness; modulus of elasticity (E) = normal stress/normal strain —synonym Young's modulus (of elasticity), coefficient of elasticity —see modulus of rigidity, modulus of rupture, moment of inertia of cross section This definition last updated 10/26/2008