|concave (ˈkɒnkeɪv, kɒnˈkeɪv)|
|2.||physics having one or two surfaces curved or ground in the shape of a section of the interior of a sphere, paraboloid, etc: a concave lens|
|3.||maths (of a polygon) containing an interior angle greater than 180°|
|4.||an obsolete word for hollow|
|5.||(tr) to make concave|
|[C15: from Latin concavus arched, from cavus hollow]|
concave con·cave (kŏn-kāv', kŏn'kāv')
Curved like the inner surface of a sphere. n.
A concave surface, structure, or line.
|concave (kŏn'kāv') Pronunciation Key
Curved inward, like the inside of a circle or sphere.