Helix The staircase in the Vatican Museums. This shows a helix. Spiral of a climber plant, also a helix In math, a helix is a curve in three dimensions. It looks a bit like a spiral. Each helix has a line called its axis. The helix has a constant angle to this line. Helices are often seen in nature and the sciences. This short article about mathematics can be made longer. You can help Wikipedia by adding to it.