NNM
The abbreviation NNM means:
- in medicine adrenal medulla, see adrenal gland #adrenal medulla
- neutral-zero method in orthopedics
- in dynamics nonlinear normal modes
- in nature and landscape protection national natural monument
NNM as a distinguishing mark on license plates:
- Poland: Powiat Nowomiejski in the Warmian-Masurian Voivodeship
