Macaroni Pasta

Macaroni is a variety of moderately extended, machine-made, dry pasta made with durum wheat. Macaroni noodles do not contain eggs, and are normally cut in short, hollow shapes; however, the term refers not to the shape of the pasta, but to the kind of dough from which the noodle is made. Although home machines exist that can make macaroni shapes, macaroni is usually made commercially by large-scale extrusion.
Source: http://en.wikipedia.org/wiki/Macaroni