deuto- [医] 第二, 次, 亚
Deuto- \Deu"to-\or Deut- \Deut-\ (d[=u]t-)[Contr. from Gr.
dey`teros second.] (Chem.)
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.