concave

a. 凹的 [医] 凹的, 凹面的

发音

UK /ˈkɒn.keɪv/
UK /kɒnˈkeɪv/
US /ˈkɑn.keɪv/
US /kɑnˈkeɪv/
US /kənˈkeɪv/

词形变化

concaves 复数 concaves concaved concaves 三单 concaving concaving 现在分词 concaved 过去式 concaved 过去分词 more concave 比较级 most concave 最高级

释义与例句

n.
  1. 1.

    A concave surface or curve.

  2. 2.

    The vault of the sky.

  3. 3.

    One of the celestial spheres of the Ptolemaic or geocentric model of the world.

    Aristotle makes [Fire] to move to the concave of the Moon. - Thomas Salusbury (1661).

  4. 4.

    An element of a curved grid used to separate desirable material from tailings or chaff in mining and harvesting.

    商务 工程
  5. 5.

    An indentation running along the base of a surfboard, intended to increase lift.

    体育
  6. 6.

    An indented area on the top of a skateboard, providing a position for foot placement and increasing board strength.

    体育
  7. 7.

    A playing card made concave for use in cheating.

    游戏
v.
  1. 1.

    To render concave, or increase the degree of concavity.

adj.
  1. 1.

    Curved like the inner surface of a sphere or bowl.

    凹

  2. 2.

    Not convex; having at least one internal angle greater than 180 degrees.

    数学
  3. 3.

    Satisfying the property that all segments connecting two points on the function's graph lie below the function.

  4. 4.

    Hollow; empty.

词汇关系

形容词

反义词 1

convex

近义相关 10

recessed acetabular biconcave bowl-shaped bursiform concavoconcave concavo-convex cotyloid cuplike cupular

参见 1

intrusive

相关短语

concave function [计] 凹函数 concave functions concave envelope concave envelopes upper concave envelope upper concave envelopes double concave

词源

From Middle English concave, from Old French concave, from Latin concavus.

来源：wiktionary