MGY

MGY or a variant thereof is used as an acronym or abbreviation for:

• MGy, megagray: 106 gray, an SI unit of absorbed dose
• mGy, milligray: 10–3 gray, an SI unit of absorbed dose
• mgy, MGY, mmgy, MMgy, or MMGY: Million gallons per year.

MGY as a callsign or identifier has been used to denote:

• MGY, the IATA code for Dayton-Wright Brothers Airport
• MGY, the callsign of Marconi's wireless telegraph station aboard RMS Titanic.

MGY may also refer to:

• MG Y-type, a motorcar produced by British auto maker MG.