The Collaborative International Dictionary of English v.0.48:

Typhoean \Ty*pho"e*an\, a. [L. Typhoius, from Typhoeus, Gr. ?,
   ?.]
   Of or pertaining to Typhoeus (t[-i]*f[=o]"[=u]s), the fabled
   giant of Greek mythology, having a hundred heads; resembling
   Typhoeus.
   [1913 Webster]

   Note: Sometimes incorrectly written and pronounced
         Ty-ph[oe][bprime]an, or Ty-phe[bprime]an.
         [1913 Webster]