Definitions for "Minute of Angle"
Keywords:  subtends, yards, angular, moa, rifle
This is an angular unit of measurement which is approximately 1.1" at 100 yards. This term is typically used in defining the click adjustments on a rifle scope.
In this context, angular change in aim that moves the point of impact of a rifle bullet one inch at 100 yards; only approximately a true mathematical minute of angle.
An angular measurement method used to describe accuracy capability. A minute of angle is one sixtieth of a degree, and subtends 1.047 inches at 100 yards, which for practical shooting purposes is considered to be one inch. A minute of angle group, therefore, equals one inch at 100 yards, two inches at 200 yards, etc.