HIO3

from The Collaborative International Dictionary of English v.0.48

Iodic \I*od"ic\, a. [Cf. F. iodique. See {Iodine}.] (Chem.)
   Pertaining to, or containing, iodine; specif., denoting those
   compounds in which it has a relatively high valence; as,
   iodic acid.
   [1913 Webster]

   {Iodic acid}, a monobasic acid ({HIO3}), consisting of iodine
      with three parts of oxygen and one of hydrogen.
      [1913 Webster]