| Substance | Abbreviation | Systematics | Provings |
| D.P.T. Vaccinum D.P.T. Vaccine |
DPT | Vaccines |
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| Dactylopius coccus cacti /Coccus cacti Cochineal |
Coc-c | Coccidae |
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| Dactylorhiza maculata / Orchis maculata Heath Spotted Orchid |
Dact-m | Orchidaceae |
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| Dactylorhiza praetermissa Southern Marsh Orchid |
Dact-p | Orchidaceae |
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| Dama dama Fallow deer |
Dama | Cervidae |
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| Daphne indica Sweet-scented Spurge Laurel |
Daph | Thymelaeaceae |
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| Daphne mezereum/ Mezereum Spurge Olive |
Mez | Thymelaeaceae |
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