Why not just say "pressure".  Much more straight forward, less jargon and economic.

Grenville Draper
Department of Earth and Environment
Florida International University
SW 8th Street and 107 Avenue
Miami, FL 33199

Professor of Geology
Associate Director of Liberal Studies
Geosciences Undergraduate Advisor
Fellow of the Geological Society
Fellow of FIU Honors College

On Feb 21, 2012, at 1:33 PM, Robert J. Twiss wrote:

How about "isotropic stress"; stress that is the same in all directions?

On Feb 21, 2012, at 10:07 AM, Rolf Bruijn wrote:

Dear all,

In a manuscript I am preparing now, I doubt about the use of the term hydrostatic stress (sigma1 = sigma 2 = sigma 3 = P), because in my case the pressurized confining medium is argon gas and not water as hydro would suggest.

So, as replacement for hydrostatic stress I am considering 'isostatic stress'.

Could you please provide any thoughts about the validity of the term isostatic stress?

Many thanks in advance,

Rolf Bruijn