Move along a curve is a term used in mathematics and physics to describe the motion of an object along a curved path. An ARC is a curved line that is part of a circle or other shape. In mathematics, an ARC is defined as the portion of a circle between two points on its circumference. In physics, an ARC is a curved path that an object follows due to the force of gravity or other forces. Therefore, the crossword solution 'ARC' can be used to describe the term 'move along a curve'.