Sekirov Dictionary

concave

UK /ˈkɒn.keɪv/US /ˈkɑn.keɪv/

noun7

  1. A concave surface or curve.
  2. The vault of the sky.
  3. One of the celestial spheres of the Ptolemaic or geocentric model of the world.
  4. An indentation running along the base of a surfboard, intended to increase lift.
  5. An indented area on the top of a skateboard, providing a position for foot placement and increasing board strength.
  6. An element of a curved grid used to separate desirable material from tailings or chaff in mining and harvesting.
  7. A playing card made concave for use in cheating.

adjective4

  1. Curved like the inner surface of a sphere or bowl.
  2. Not convex; having at least one internal angle greater than 180 degrees.
  3. Satisfying the property that all segments connecting two points on the function's graph lie below the function.
  4. Hollow; empty.

verb1

  1. To render concave, or increase the degree of concavity.
forms

concaved · concaving · concaves · more concave · most concave

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