Definition of "spira" [spira]

• In architecture, the moldings at the base of a column; a torus. (noun)

The Century Dictionary (Public Domain)

• "In one incarnation the spira is a scooter-based low-cost, highly efficient, design for the masses, whilst it wouldn't take a lot to turn it into a wonderful, agile safe and ever so sporting three wheeled sports car, with cooled seats and all modern conveniences and a wicked power to weight ratio."
• "Although basically crooked enough to hide behind a spira l staircase, he is genuinely fond of Rafik and Acorna."
• "Jakob Bernouli, a mathematician from a great family of brilliant people, called the logarithmic spiral spira mirabilis, or "the Miraculous Spiral," so called because the size increases but its shape is unaltered with each successive curve."