| dike | An embankment (usually of earth) constructed to keep water in or out of a given area. (09 Oct 1997) |
|---|---|
| diketohydrindylidene-diketohydrindamine | The coloured product formed in the reaction of an alpha-amino acid and ninhydrin (triketohydrindene hydrate); a reaction used in the quantitative assay of alpha-amino acids. (05 Mar 2000) |
| diketone | A molecule containing two carbonyl groups; e.g., acetylacetone (CH3COCH2COCH3). (05 Mar 2000) |
| diketopipe razines | A class of organic compounds with a closed ring structure formed from two alpha-amino acids by the joining of the alpha-amino group of each to the carboxyl group of the other, with the loss of two molecules of water. (05 Mar 2000) |