n. (Chem.) a compound containing the covalent iodine radical. [ WordNet 1.5 ]

n. [ Iodo- + cresol. ] (Org. Chem.) Any of several isomeric iodine derivatives of the cresols, C6H3I(CH3)OH, esp. one, an odorless amorphous powder, used in medicine as a substitute for iodoform. [ Webster 1913 Suppl. ]

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 ]

n. [ Iodoform + -gen root of gi`gnesqai to be born. ] (Pharm.) A light powder used as a substitute for iodoform. It is a compound of iodoform and albumin. [ Webster 1913 Suppl. ]

n. [ Iodo- + pyrrol. ] (Chem.) A crystallized substance of the composition C4I4NH, technically tetra-iodo-pyrrol, used like iodoform. [ Webster 1913 Suppl. ]

n. [ Iodo- + quinine. ] (Chem.) A iodide of quinine obtained as a brown substance, . It is the base of herapathite. See Herapathite. [ 1913 Webster ]

n. [ Iodo- + thyro- + -in. ] (Physiol. Chem.) A peculiar substance obtained from the thyroid gland, containing from nine to ten per cent of iodine.

☞ It is a very stable compound, and is believed to be active principle in thyroid extracts and in the internal secretion of the thyroid gland. It was originally called thyroiodin. [ Webster 1913 Suppl. ]

☞ It is probably an impure extract of thyroid gland, containing thyroxine. See Merck Index 11th Ed. #9345, the entry for thyroidin. [ PJC ]

a. (Chem.) Pertaining to, or containing, iodine. See -ous (chemical suffix). [ 1913 Webster ]

Iodous acid, a hypothetical acid, analogous to chlorous acid. [ 1913 Webster ]