The Collaborative International Dictionary of English v.0.48:

Iodoform \I*od"o*form\, n. [Iodo- + formyl. See Formyl, and
   cf. Chloroform.] (Chem.)
   A yellow, crystalline, volatile substance, CI3H, having an
   offensive odor and sweetish taste, and analogous to
   chloroform. It is used in medicine as a healing and
   antiseptic dressing for wounds and sores.
   [1913 Webster]