pasigraphy

from WordNet (r) 3.0 (2006)

Pasigraphy
    n 1: an artificial international language using characters (as
         mathematical symbols) instead of words to express ideas

from The Collaborative International Dictionary of English v.0.48

Pasigraphy \Pa*sig"ra*phy\, n. [Gr. ? for all (dat. pl. of ?
   all) + -graphy.]
   A system of universal writing, or a manner of writing that
   may be understood and used by all nations. --Good.
   [1913 Webster]