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Webster 1913 Edition

Noun.

[Cf. Sp.

redundar

to overflow.]

The lees or dregs of cane juice, used in the distillation of rum.

[West Indies]

The use of

dunder

in the making of rum answers the purpose of yeast in the fermentation of flour.

B. Edwards.

Noun.

[L.] Lees; dregs; a word used in Jamaica.

The use of dunder in the making of run answers the purpose of yeast int he fermentation of flour.

dunder ‎(uncountable)

(Caribbean, West Indies) The lees or dregs of cane juice, used in the distillation of rum.
- B. Edwards
  The use of dunder in the making of rum answers the purpose of yeast in the fermentation of flour.

dunder

J. Poole W. Barnes, A Glossary, with Some Pieces of Verse, of the Old Dialect of the English Colony in the Baronies of Forth and Bargy (1867)