In a biological material the measured strain is a function of stress, time and temperature. When a material deforms as a function of time under a constant load, we call this phenomenon _______.

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The phenomenon described is creep, which is the time-dependent deformation under a constant load. Stress-relaxation refers to the decrease in stress over time for a constant strain, viscoelastic refers to materials that display both elastic and viscous behavior, and hysteresis refers to the lag in response when stress is applied and then removed.

In a Biological Material the Measured Strain Is a Function