- Macromolecule
- Magnetic Field Strength
- Magnetic Flux
- Magnetic Susceptibility
- Magnetization
- Malleable Cast Iron
- Martensite
- Matrix phase
- Matthiessen’s Rule
- Metal
- Metallic Bond
- Metal Matrix Composite
- Metastable State
- Microconstituent
- Micro Electromechanical System
- Microscope
- Microstructure
- Miller Indices
- Mobility
- Modulus of Elasticity
- Molarity
- Mole
- Moulding
- Molarity
- Molecular Structure
- Molecular Weight
- Monomers
- MOSFET