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mono-iodo-

mono-ˈiodo- Chem.
  [See mono- 2 and iodo-.]
  Combining form, denoting the presence in a compound of one atom of iodine.

1873 Fownes' Chem. (ed. 11) 802 Oxyphenols are formed from the corresponding monoiodophenols. 1891 Syd. Soc. Lex., Monoiodopentane, same as Amyl iodide.

Oxford English Dictionary

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