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deut-iodide
1. In Chemistry to distinguish the second in order of the terms of any series. Thus deut-iodide, deuto-bromide, deuto-carbonate, deuto-chloride, deuto-sulphide, etc. The prefix has sometimes been improperly used to indicate the constitution of a compound, as compared with that of the proto- or mono- compound of the same series; but it is now obsolescent, being usually replaced by such prefixes as sesqui-, di-, tri-, etc., which properly indicate the constitution.
extracted from deuto-comb. form deutoxide n. 
/dʒuːˈtɒksʌɪd/,
Brit. /djuːˈtɒksʌɪd/
, /djuːˈtɒksʌɪd//dʒuːˈtɒksʌɪd/U.S. /d(j)uˈtɑkˌsaɪd/
the second of the series of oxides of a metal, etc., that which comes next to the protoxide, containing the next smallest quantity of oxygen./d(j)uˈtɑkˌsaɪd/ΚΠ
1822 T. Webster Imison's Elem. Sci. & Art (new ed.) II. 20 The smallest quantity of oxygen forms the protoxide of the metal, the second quantity of oxygen makes the deutoxide.
1823 W. Henry Elements Exper. Chem. (ed. 9) I. ix. 477 When there are several oxides of the same metal, he [sc. Dr. Thomson] has proposed the terms protoxide, deutoxide, tritoxide, &c.
1823 W. Henry Elements Exper. Chem. (ed. 9) II. ix. 70 The deutoxide and peroxide of antinomy ought..to be arranged among acids.
1854 J. Scoffern in Orr's Circle Sci. Chem. 489 Binoxide, sometimes called deutoxide of copper (Cu O2).
1857 W. R. Bullock tr. P. Cazeaux Theoret. & Pract. Treat. Midwifery (ed. 2) 137 Precipitated by the deuto-chloride of mercury.
1864 H. Spencer Illustr. Progress 40 Later in the Earth's history, are the deutoxides, tritoxides, etc.
1864 H. Spencer Princ. Biol. I. 6 Deutoxide of nitrogen is a gas hitherto uncondensed.
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