rectification

noun

• The action or process of rectifying.

  "the rectification of an error; the rectification of spirits"

• The determination of a straight line whose length is equal to a portion of a curve.
• The truncation of a polyhedron by replacing each vertex with a face that passes though the midpoint of each edge connected to the vertex; an analogous procedure on a polytope of dimension higher than 3.
• The adjustment of a globe preparatory to the solution of a proposed problem.
• (chemical engineering) Purification of a substance through repeated or continuous distillation.