Sundial's nodus refers to the point on a sundial where the gnomon casts a shadow to indicate the time. There are several synonyms for this term, including gnomon's point, sundial's tip, and shadow-casting mark. Other synonyms may include sun marker, time indicator, or shadow pointer. Regardless of the name, the sundial's nodus has been used for centuries as a simple and effective way to tell time based on the sun's position in the sky. Some early sundials even had multiple nodi to account for time differences throughout the year. While modern technology has made telling time much easier, the sundial's nodus remains an intriguing symbol of our past.