Deuto-
Pronunciation : Deu"to- or Deut- (dut-)
Etymology : [Contr. from Gr. (Chem.)
Definition : Defn: A prefix which formerly properly indicated the second in a regular series of compound in the series, and not to its composition, but which is now generally employed in the same sense as bi- or di-, although little used.
Source : Webster's Unabridged Dictionary, 1913