Meridiana is a term that refers to a sundial, a device used to tell time based on the position of the sun. It typically consists of a flat plate marked with hours and a gnomon, which is a stick or a triangular blade that casts a shadow. As the sun moves across the sky, the shadow indicates the time of day. In addition to its practical use, a meridiana can also have artistic and historical significance. Many cultures have created beautifully designed sundials, often incorporating intricate carvings or inscriptions. They serve as a reminder of humanity's long-standing relationship with time and nature.