Rectification has the following technical meanings: Mathematics Rectification (geometry), truncating a polytope by marking the midpoints of all its edges, and cutting off its vertices at those points Rectifiable curve, in mathematics Rectifiable set, in mathematics Science GHK flux equation#Rectification, in biology, a process in cell membranes Technology Image rectification, adjustment of images to simplify stereo vision or to map images to a map coordinate system (GIS) The function of a rectifier, a device that converts alternating electrical current to direct current Rectified airspeed, a means of displaying the airspeed of high-speed aircraft Rectification (chemical/process engineering), countercurrent distillation, a unit operation also used for the production of rectified spirit (see Distillation#Fractional distillation) Other uses Rectification (law), an equitable legal remedy whereby a court orders a change in a written document to reflect what it should have said in the first place Rectification, in astrology, "rectification of the birth time" is used when natal birth time is imprecise Rectification movement (disambiguation) Rectification of names (), a practice in Confucian philosophy Rectification, a process that creates a rectified spirit (alcohol) See also Rectification movement (disambiguation) Rectifier (disambiguation) Rectify, American television series ja:蒸留#精留