| Substance | Abbreviation | Systematics | Provings | 
| Zalcitabinum Zalcitabine  | 
            Zalcita | Synthetic Drugs | 
            |
| Zaluzianskya capensis | 
            Zalu-c | Scrophulariaceae | 
            |
| Zamzam Aqua | 
            Zam-aq | Aquae mineraliae | 
            |
| Zanamivirum Zanamivir  | 
            Zanam | Synthetic Drugs | 
            |
| Zantedeschia aethiopica Calla lily  | 
            Zant-ae | Araceae | 
                                                                             
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| Zantedeschia albomaculata Spotted arum lily  | 
            Zant-a | Araceae | 
                                                                                                       
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| Zanthoxylum tingoassuiba | 
            Xan-t | Rutaceae | 
            |
| Zapoteca tetragona | 
            Zapo-t | Mimosaceae | 
            |
| Zea mays pabuli Fodder Maize  | 
            Zea-m | Gramineae/ Poaceae | 
            |
| Zea mays/ Pollen maydis Maize Pollen  | 
            Zea-m-po | Gramineae/ Poaceae | 
            |
| Zea mays/ Stigmata maydis Maize  | 
            Zea-m | Gramineae/ Poaceae | 
            |
| Zenaida macroura Mourning dove  | 
            Zena-m | Columbidae | 
            |
| Zephyranthes rosea Cuban zephyrlily  | 
            Zephy-r | Amaryllidaceae | 
            |
| Zidovudinum Zidovudine  | 
            Zidov | Synthetic Drugs | 
            |
| Zincum aceticum Acetate of Zinc  | 
            Zinc-acet | Aliphatic Carbon Compounds | 
                                                                             
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