- Morphology (Biology): It is the study of the form and structure of organisms.
- Morphology (Linguistics): It is the study of the structure and content of words forms.
- Molecular biology: The study of the structure and function of the molecules associated with living organisms.
- Mycology: The study of fungi and fungus diseases.
- Myology: It is the study of muscular systems.
- Nephrology: It is the study of the functions and diseases of the kidney.
- Neurology: The study of nervous system, its functions and its disorders.
- Nuclear Physics: The study of interaction of the nuclei.
- Numerology: The study of numbers, connected with the date and year of one’s birth so as to determine their influence on one’s future life.
- Numismatics: The study of coins and medals.