NMO

NMO may refer to:


 * Neuromyelitis optica, also known as Devic's disease or Devic's syndrome
 * N-Methylmorpholine N-oxide, an organic compound
 * Nitronate monooxygenase, an enzyme
 * Normal Move Out, in reflection seismology
 * National Measurement Office, a government agency in the United Kingdom
 * New Motorola, a mobile antenna connector
 * COMMSTA NMO, a United States Coast Guard Communication Station in Honolulu, Hawaii