| Substanz | Abkürzung | Systematik | Provings |
| Macaca rhesus / Lac rhesus Rhesusaffenmilch Rhesus Monkey Milk |
Lac-rhes | Cercopithecidae |
|
| Mackaya bella Forest bell bush |
Macka-b | Acanthaceae |
|
| Macleania insignis |
Macle-i | Ericaceae |
|
| Macleania rupestris |
Macle-r | Ericaceae |
|
| Macleaya microcarpa Federmohn Kelways Coral Plume |
Macl-m | Papaveraceae |
|
| Maclura pomifera Milchorangenbaum Osage-orange |
Macl-p | Moraceae |
|
| Macphersonia gracilis |
Macp-g | Sapindaceae |
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| Macrolepiota procera Parasol Parasol Mushroom |
Macrol-pr | Agaricaceae |
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| Macronectes giganteus Riesensturmvogel Southern Giant Petrel |
Macron-g | Procellariidae |
|
| Macropus giganteus /Lac macropi Östliches Graues Riesenkänguruh Eastern Grey Kangaroo |
Macrop-g | Macropodidae |
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| Macrothylacia rubi Brombeerspinner Fox moth |
Macroth-r | Lasiocampidae |
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| Macrotinum Macrotin Macrotinum |
Macrin | Ranunculaceae |
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| Macrovipera lebetina Levanteotter Levant viper |
Macrov-l | Viperidae |
|
| Macrovipera mauritanica Atlasotter Moorish viper |
Macrov-m | Viperidae |






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