An acronym for "minute of angle," that is, for the arcminute (see minute [2], above). This unit is commonly used in target shooting to express the angular size of targets or the spacing between marks on a reticle (the grid of lines seen in the eyepiece of a rifle). By coincidence, 1 moa is very nearly equal to a target size of 1 inch at 100 yards; in fact, 1 moa = 1.047 20 inches at 100 yards or 10.4720 inches at 1000 yards. In metric units, 1 moa = 2.9089 centimeters at 100 meters