concave 中文
EN
US 名凹透镜
FR concave 
- 名词 (Noun)PLconcavesPREcon-
- A concave surface or curve.
- The vault of the sky.
- 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).
- (manufacturing) An element of a curved grid used to separate desirable material from tailings or chaff in mining and harvesting.
- (surfing) An indentation running along the base of a surfboard, intended to increase lift.
- (skateboarding) An indented area on the top of a skateboard, providing a position for foot placement and increasing board strength.
- A concave surface or curve.
- 动词 (Verb)SGconcavesPRconcavingPT, PPconcaved
- 形容词 (Adjective)COMmore concaveSUPmost concave
- curved like the inner surface of a sphere or bowl.
- (geometry, not comparable, of a polygon) not convex; having at least one internal angle greater than 180 degrees.
- (functional analysis, not comparable, of a real-valued function on the reals) satisfying the property that all segments connecting two points on the function's graph lie below the function.
- hollow; empty.
- curved like the inner surface of a sphere or bowl.
- 更多范例
- 用于句中
- A few bright and beautiful stars gemmed the wide concave of heaven [ … ] .
- 用于句中
Definition of concave in English Dictionary
- 词类阶层 (Part-of-Speech Hierarchy)
- 形容词
- 名词
- 可数名词
- 可数名词
- 动词
- 形容词
资料来源: 维基词典
在语法上，这个单字"concave"是一个形容词。它同时也是一个名词，更具体地来说，是一个可数名词。它同时也是一个动词。