1. n. [Drilling Fluids]
A unit of measurement for viscosity, symbolized by P. Viscosity is the ratio of shear stress to shear rate, giving the traditional unit of dyne-sec/cm2 for poise. In metric (SI) units, 1 P is 0.1 Pa.s (pascal-second).
See: apparent viscosity, centipoise, power-law fluid, rheology, yield
