The crossword solution for the term PARABOLA PART is ARC, which is a three-letter word. An ARC is a curved line that forms part of the circumference of a circle or other shape. In mathematics, a parabola is a two-dimensional, mirror-symmetrical curve, which is approximately U-shaped when oriented as shown in the image, but which can be in any orientation in its plane. The parabola has many important applications, from a parabolic reflector to capture and focus waves to the design of antenna. The ARC is an important part of the parabola, as it forms the curved line that makes up the parabola's shape.