Definition of iodo- in English:

iodo-

Pronunciation: /ˈʌɪədəʊ, ʌɪˈəʊdəʊ/
(usually iod- before a vowel)

combining form

Chemistry
Representing iodine.

Definition of iodo- in:

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Word of the day flagitious
Pronunciation: fləˈdʒɪʃəs
adjective
(of a person or their actions) criminal; villainous