The Collaborative International Dictionary of English v.0.48:

Physiocrat \Phys"i*o*crat\ (f[i^]z"[i^]*[-o]*kr[a^]t), n. [Gr.
   fy`sis nature + kratei^n to rule.]
   One of the followers of Quesnay of France, who, in the 18th
   century, founded a system of political economy based upon the
   supremacy of natural order. --F. A. Walker. --
   Phys`i*o*crat"ic, a.
   [1913 Webster]