| Termen/ Term | Nr. apariții/ No. occurrences |
| MOLERA | 1 |
| MOLISCA | 1 |
| MOLLUSCA | 166 |
| MOLLUSCA: MELC | 2 |
| MOLOR | 1 |
| MOLUSC | 86 |
| MOLUSCA | 3,018 |
| MOLUSKA | 1 |
| MORCOV | 9 |
| MREANA | 1 |
| MREANA VINATA | 2 |
| MUCOASA INTESTINALA LA OM NORMALA SI BOLNAVA | 1 |
| MUCOASA STOMACALA LA OM | 1 |
| MUCOASA TUBULUI DIGESTIV LA OM | 1 |
| MUFLONUL | 1 |
| MUFLONUL AMERICAN | 2 |
| MUGURAR | 18 |
| MUMA PADURII | 2 |
| MUNTIACUL INDIAN | 1 |
| MURENA | 2 |
| MURGOI BALTAT | 3 |
| MUSCA | 1,539 |
| MUSCA GULERAT | 1 |
| MUSCAR | 1 |
| MUSCAR AUSTRALIAN | 1 |
| MUSCAR GULERAT | 12 |
| MUSCAR NEGRU | 10 |
| MUSCAR SUR | 5 |
| MUSCATU DRACULUI | 13 |
| MUSCHI | 713 |
| MUSCHI DE PAMINT | 1 |
| MUSCULATURA PICIORULUI LA IEPURE | 1 |
| MUSETEL | 11 |
| MUSETEL PROST | 9 |
| MUSTAR DE CIMP | 8 |
| MYCOSPHAERELLA FRAGARIAE | 1 |
| MYSID CRUSTACEU | 1 |
| MYSIDACEU | 3 |
| NAFURICA | 1 |
| NAGARA | 1 |
| NAGIT | 18 |
| NALBA | 1 |
| NAMBU-GUAGU | 1 |
| NAPI PORCESTI | 2 |
| NAPIRCA | 5 |
| NAPRASNIC | 12 |
| NAPRAZNIC | 1 |
| NARCISA | 2 |
| NARCISE | 2 |
| NARCOMEDUZA | 1 |