Helical/ˈhelɪkl/ Definition 1 of 2Pro Tip 1/3Technical Usage Often used in engineering and physics to describe objects like springs and gears. When compressed, a helical spring releases stored mechanical energy. Pro Tip 2/3Visual Imagery Imagine a spiral staircase to understand 'helical' in practical objects. The helical staircase in the library adds a unique architectural element. Pro Tip 3/3Not Flat 'Helical' items are three-dimensional, not just circles or curvy lines. The artist twisted the metal into a helical sculpture.