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