equation of piezotropy

equation of piezotropy

[i′kwā·zhən əv pē·ə′zä·trə·pē]
(thermodynamics)
An equation obeyed by certain fluids which states that the time rate of change of the fluid's density equals the product of a function of the thermodynamic variables and the time rate of change of the pressure.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.