concavity
/kɑnˈkævəti/
noun
- The quality or state of being curved inward like the inside of a bowl.
- The concavity of the spoon helps hold liquid.
- Geologists studied the concavity of the valley formed by the glacier.
- The lens has a slight concavity that helps focus light.
- A surface or shape that curves inward.
- The sculpture features a deep concavity in its center.
- Rainwater collected in the natural concavity of the rock.
- The mirror's concavity makes objects appear larger.
Synonyms