What is the standardized, exact definition of the Astronomical Unit (AU) in meters, adopted by the IAU in 2012?

Answer

149,597,870,700 meters

The International Astronomical Union (IAU) established the AU in 2012 as a precise, fixed length corresponding exactly to 149,597,870,700 meters, making it independent of the Earth's momentary orbital position.

What is the standardized, exact definition of the Astronomical Unit (AU) in meters, adopted by the IAU in 2012?
ChemistrygoldSymbolabbreviation