- Melia
- Medicago
- Malus
- Mercurialis
- Manihot
- Melastoma
- Mespilus
- Medinilla
- monocratie
- mercury poisoning
- muscovy
- malady to be incurable
- Margasivsa
- mayakovski
- maya lin
- Momordica balsamina
- Momordica charantia
- melon vine
- muntjac
- milt
- martha graham
- martha's vineyard
- meltable
- marsh marigold
- May blob
- meadow bright
- Melampodium leucanthum
- meadow rue
- mountain pride
- Monotropa uniflora
- meadow salsify
- mule's ears
- Moquelumnan
- marsh hare
- morganite
- moonstone
- moss agate
- maria callas
- maria meneghini callas
- maths
- matrix operation
- method of fluxions
- metamathematics
- mathematics
- meat cleaver
- mudskipper
- Messidor
- montgomery's tubercle
- Moharram
- Muharram