Definitions for "Poisson's Ratio"
The absolute value of the ratio of the transverse (lateral) strain to the longitudinal strain when a material is being stressed elastically.
The ratio of transverse strain to axial strain during axial load.
See elastic properties of rocks.
Keywords:  sze, umc, wiley, temp, professor
0.31 Properties at temp=300 K,wavelength not given for refractive index Semiconductor Sensors,by S.M.Sze,UMC chair professor,John Wiley & Sons ,INC.Appendix D, p.535