A pasta made of flour, water, and egg yolks. (Macaroni and spaghetti don't use egg yolks.) Noodles come in a wide variety of shapes and are used all around the world.
A noodle is a thin strip of pasta, usually cut or extruded from some kind of dough. It is the basic unit in dishes like spaghetti, linguine, soba, and udon. The term often refers to moist, cooked pasta, since it has connotations of curviness and slipperiness, but also to dried noodles that must be reconstituted by boiling or soaking in water.