Word · Frequency #16763
convex
凸的；鼓起的
curving or bulging outward
- 1.
Curved or bowed outward like the outside of a bowl, circle, or sphere.
像碗、圆或球的外表面那样向外弯曲的；凸的。
- 2.
curving or bulging outward
向外凸起的
- 3.
having an epigraph that is a convex set.
上境图是凸集的。
- 4.
having no internal angles greater than 180 degrees.
没有内角大于180度的。
- 5.
arranged such that for any two points in the set, a straight line between the two points is contained within the set.
集合中任意两点之间的直线段包含在该集合内。
凸的；像碗、圆或球的外表面那样向外弯曲的；凸的。；向外凸起的；上境图是凸集的。；没有内角大于180度的。
In use
The convex mirror on the wall allows the driver to see a wider area.
The lens of a magnifying glass is convex on both sides.
In geometry, a convex polygon has all interior angles less than 180 degrees.
convex + noun
convex 作定语时常用以修饰 lens、mirror、polygon、set 等名词。
A convex lens focuses light.
凸透镜能聚焦光线。
be + adv + convex
be 后接 convex 表示状态，可用 slightly、strongly 等程度副词修饰。
The surface of the shield is slightly convex.
盾牌的表面略微向外凸起。
become convex
become 后接 convex 表示从非凸状态变为凸的状态。
Connections
Collocations
- convex lens
- 凸透镜
- A convex lens focuses light to a point.凸透镜将光聚焦到一点。
- convex mirror
- 凸面镜
- The convex mirror shows a wider area behind the car.凸面镜显示车后更宽的区域。
- convex hull
- 凸包
- The convex hull of a set of points is the smallest convex polygon containing them.一组点的凸包是包含它们的最小凸多边形。
- convex surface
- 凸面
- The convex surface of the shield deflected the arrow.盾牌的凸面使箭偏离了方向。
- convex shape
- 凸形
- The bowl has a convex shape on the outside.这只碗的外形是凸的。
- convex side
Learner notes
Memory Tip
联想凸透镜：中间向外鼓的镜片就是 convex。词形里字母 v 像向外张开的尖角，记住 v 朝外 = 凸。
Context & Register
语域：mixed 常见场景：mathematics、optics、describing shapes convex 在数学（如 convex set、convex function）和光学（如 convex lens）中属正式术语，多用于教材或专业文章；日常描述物体向外弯曲或鼓起的形状时语气中性，也可用 curved outward 等更口语的说法。
Grammar Note
形容词，通常用作定语或表语，不依赖特定介词。
Pronunciation & Spelling
convex 读作 /kənˈvɛks/，重音在第二音节 -vex-。列表中的 vex、flex、checks、specs、sex、wrecks 都以重读的 /ɛks/ 结尾，和 convex 押韵。注意拼写相近的 index /ˈɪndɛks/ 和 converse /kənˈvɜːrs/ 听起来并不一样，不能按外形类推。
Learn the forms together
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from AI_FALLBACK, ECDICT, WIKTIONARY.