concavity
1. [ noun ] a shape that curves inward
Synonyms: incurvation incurvature concave_shape
Related terms: solid recess cup indentation basin dome scoop pit depression incurvate
2. [ noun ] the property possessed by a concave shape
Synonyms: concaveness
Related terms: shape hollowness
Similar spelling:   concavely
  concave
  concaveness