dar·cy
| \ ˈdärsē \
plural -s
Definition of darcy
: a unit of porous permeability in physics equal to the permeability of a medium through which the rate of flow of a fluid having one centipoise viscosity under a pressure gradient of one atmosphere per centimeter would be one cubic centimeter per second per square centimeter cross section — compare darcy's law
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Merriam-Webster unabridged
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