pou sto

from The Collaborative International Dictionary of English v.0.48

Pou sto \Pou sto\ (p[=oo] st[=o]; pou st[=o]). [Gr. poy^ stw^
   where I may stand; -- from the reputed saying of Archimedes,
   "Give me where I may stand and I will move the whole world
   with my steelyard."]
   A place to stand upon; a locus standi; hence, a foundation or
   basis for operations.
   [Webster 1913 Suppl.]