Mito-
Thread (mitosis)
Molluscus
Soft (mollusca)
Mono-
One (monomer)
Morph-
Form (morphing)
Mort-
Death (immortal)
Motio
Motion (motile)
Multi-
Many (multitude)
Mutat
To change (mutation)
Myo-
Muscle (myofibril)
Nano-
Dwarf, very small (nanometer)
Nat
Birth (prenatal)
Nate
Birth (inate)
Naut-
Sail (nautical)
Nema-
Thread (nematocyte)
Neo-
New (neolithic)
Nephr-
Kidney (nephritis)
Neuro-
Nerve (neurological)
Nocti-
Night (nocturnal)
Nom
Law (autonomic)
Nomem
Name (nomenclature)