DDT : Othmar Zeidler, Germany, 1874.

Detector, Metal : Gerhard Fisher, Germany/U.S.A., late 1920s.

Deuterium : (heavy hydrogen) Harold Urey, U.S.A., 1931.

DNA : (deoxyribonucleic acid) Friedrich Meischer, Germany, 1869; (determination of double-helical structure) F. H. Crick, England and James D. Watson, U.S.A., 1953.

Dye : William H. Perkin, England, 1856.

Dynamite : Alfred Nobel, Sweden, 1867.