mono-ˈiodo-Chem. [See mono- 2 and iodo-.] Combining form, denoting the presence in a compound of one atom of iodine. 1873Fownes' Chem. (ed. 11) 802 Oxyphenols are formed from the corresponding monoiodophenols.1891Syd. Soc.Lex., Monoiodopentane, same as Amyl iodide.