The Collaborative International Dictionary of English v.0.48:

Gomphiasis \Gom*phi"a*sis\, n. [NL., fr. Gr. ? toothache or
   gnashing of teeth, fr. ? a grinder tooth, from ? a bolt.]
   (Med.)
   A disease of the teeth, which causes them to loosen and fall
   out of their sockets. [Archaic]
   [1913 Webster]