The Collaborative International Dictionary of English v.0.48:

Iod- \I"od-\ (Chem.)
   See Iodo-.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Iodo- \I"o*do-\, Iod- \I"od-\ (Chem.)
   A prefix, or combining from, indicating iodine as an
   ingredient; as, iodoform.
   [1913 Webster]