A maser is a device that produces coherent electromagnetic waves.
Maser may also refer to: Maser (rocket), a sounding rocket launched from Esrange in Sweden Maser, Veneto, a municipality in Italy Astrophysical maser, a naturally occurring source of stimulated spectral line emission Maser, a codename later used by the DC Comics character Air Wave
People with the surname Mike Maser (1947–2019), an American football coach and player Werner Maser (1922–2007), German historian and author of books about Adolf Hitler
See also Mazer (disambiguation)