Source : Webster's Revised Unabridged Dictionary (1913)

Ptyalism \Pty"a*lism\, n. [Gr. ?, fr. ? to spit much, fr. ?
   spittle, fr. ? to spit: cf. F. ptyalisme.]
   Salivation, or an excessive flow of saliva. --Quain.

Source : WordNet®

ptyalism
     n : excessive flow of saliva