concave

名词 n. 动词 v. 形容词 adj.
中文释义
英 /ˈkɒn.keɪv/|/kɒnˈkeɪv/    美 /ˈkɑn.keɪv/|/kɑnˈkeɪv/|/kənˈkeɪv/

英文释义

名词 n.
  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.
    — Aristotle makes [Fire] to move to the concave of the Moon. - Thomas Salusbury (1661).
  4. An element of a curved grid used to separate desirable material from tailings or chaff in mining and harvesting.
  5. An indentation running along the base of a surfboard, intended to increase lift.
  6. An indented area on the top of a skateboard, providing a position for foot placement and increasing board strength.
  7. A playing card made concave for use in cheating.
动词 v.
  1. To render concave, or increase the degree of concavity.
形容词 adj.
  1. Curved like the inner surface of a sphere or bowl.
  2. Not convex; having at least one internal angle greater than 180 degrees. not-comparable
  3. Satisfying the property that all segments connecting two points on the function's graph lie below the function. not-comparable
  4. Hollow; empty.
    — as concave […] as a worm-eaten nut

词形变化

more concave comparative most concave superlative concaves plural concaves present,singular,third-person concaving participle,present concaved participle,past concaved past

词汇关系

近义词
concavous
反义词
convex
衍生词
biconcave concavation concave envelope concave function concavely concaveness concavification concavify concavity concavoconcave convexoconcave double concave nonconcave planoconcave proconcave pseudoconcave quasiconcave subconcave upper concave envelope

词源

词源 1
From Middle English concave, from Old French concave, from Latin concavus.
词源 2
From Middle English concave, from Old French concave, from Latin concavus.
词源 3
From Middle English concave, from Old French concave, from Latin concavus.
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