- Bud (Ujung batang/Meristem)
- Chondriosome (Mitokondria, kondriosom)
- Compound eye (Mata majemuk)
- Maag (tukak lambung)
- Metabolisme
- Metagenesis
- Metamere
- Metamerism
- Metamorfosis
- Metamori
- Metaplasma
- Metathorax (Metatoraks)
- Metazoa
- Micropyle
- Micronucleus
- Microsporangium
- Microspore
- Microstrobilus
- Microsporophyll
- Mikroflora