Ramadhan

from The Collaborative International Dictionary of English v.0.48

Ramadan \Ram`a*dan"\ (r[a^]m`[.a]*d[a^]n"), n. [Ar.
   rama[dsdot][=a]n, or ramaz[=a]n, properly, the hot month.]
   [Written also {Ramadhan}, {Ramadzan}, and {Rhamadan}.]
   1. The ninth Mohammedan month.
      [1913 Webster]

   2. The great annual fast of the Mohammedans, kept during
      daylight through the ninth month.
      [1913 Webster]