känˈkavəd.ē, -ətē, -i sometimes kən- noun
( -es )
Etymology: Middle French concavité, from Late Latin concavitat-, concavitas, from Latin concavus + -itat- -itas -ity
1.
a. : a concave line or surface or the space included by it : a hollow especially of a vault or a hemisphere
b. : a depression resembling a bowl
2. : concave 1
3. : the quality or state of being concave