entasis
/ˈɛntəsɪs/
noun
- A slight convex curve in the shaft of a column, used in architecture to correct the optical illusion of concavity.
- The ancient Greek architects used entasis to make the columns look straight from a distance.
- The slight entasis on the pillars gave the building a more graceful appearance.
- Students of architecture learn about entasis as a key feature of classical design.