Online Google Dictionary

concave 中文解釋 wordnet sense Collocation Usage Collins Definition
Adjective
/känˈkāv/,/ˈkänˌkāv/,
Font size:

Having an outline or surface that curves inward like the interior of a circle or sphere,
  1. Having an outline or surface that curves inward like the interior of a circle or sphere

  1. curving inward
  2. (concaveness) concavity: the property possessed by a concave shape
  3. A concave surface or curve; The vault of the sky; One of the celestial spheres of the Ptolemaic or geocentric model of the world; An element of a curved grid used to separate desirable material from tailings or chaff in mining and harvesting; An indentation running along the base of a ...
  4. (Concaved) When ordinaries, etc., are bowed in the form of an arch they are sometimes referred to as concaved.
  5. (Concaves) The cast manganese liners of the chamber of a gyratory crusher.
  6. Non-convex and simple.
  7. Pertaining to a linear structure, margin, or surface that is curved inward (cf. convex).
  8. A surface curved like the interior of a circle or sphere.
  9. Property that a curve is below a straight line connecting two end points. If the curve falls above the straight line, it is called convex.
  10. Surface, bending slightly inwards. See convex.
  11. A polygon is concave if it has at least one angle of greater than 180 degrees between consecutive sides, eg a dart or arrow-head shaped polygon is concave, but a pentagram is better referred to as nonconvex, because although it is not convex, all of its five angles are less than 180 degrees. ...
  12. The carving-out of a boomerang’s lower side is a common technique to increase drag and keep a boomerang’s flight low
  13. Said of a curve that bulges away from some reference point, usually the horizontal axis or the origin of a diagram. More formally, a curve is concave from below (or concave to something below it) if all straight lines connecting points on it lie on or below it. Contrasts with convex.
  14. curved or bulging inwards, in eucalypts usually referring to the disc of the fruit where the outer wall is curved inwards [image]
  15. A term to describe an outline which curves inward. Synonymous with incurvate and the opposite of convex and excurvate. Suggested that this term only be used to describe basal edges.
  16. of a surface, curving inward, or away from the eye. For example, a bowl appears concave when viewed from above. In geometry, a concave polygon is one that has an interior angle greater than 180°. Concave is the opposite of convex.
  17. A polygon whose at least one angle is larger than the straight angle (180^°).
  18. Curved downwards, when seen from the top of the pan.
  19. AN OPTICAL LENS FORM HAVING BOTH LENS SURFACES CURVED INWARDS
  20. A lens which is flatter in the centre than at the edge (diverging lens) is known as a concave lens. Concave spectacle lenses (minus lenses) are used for short sightedness.
  21. Refers to the concave in the bottom of a surfboard which forms an air pocket, thus reducing drag and increasing speed. Science innit?!
  22. the edge-to-edge channel that runs down the ski base.
  23. a polyhedron in which some of the flat surfaces slope inwards
  24. curved like the inner surface of a sphere
  25. An arch of ranged units that allow all of them to attack a similar target. When one army is in a concave, they have the advantage, as all of their units can fire while their opponent has a harder time getting all of their units in the battle.