凸

• Pinyin: tū
• Desglose de hanzi: 凸 — pictograph of a protruding shape

Significado

convexo; abombado; sobresaliente

Describes a surface that curves or bulges outward, opposite of concave (凹). Used in optics (凸透镜 convex lens), geography (凸岸 convex bank), and general descriptions of shapes.

Ejemplos

1. 凸透镜可以聚焦光线，用来点火或者放大。
2. 地面上有几块凸起的石头，走路要小心。
3. 这款键盘的键帽是凸面设计，手感很舒服。

Guía de uso

Contexto: shapes, optics, descriptions

Tono: technical

Correcto

• 凸透镜。(Convex lens.)
• 凸起。(Protrusion.)

Incorrecto

• 把'凸'和'凹'搞混 (凸 is convex/protruding — 凹 is concave/indented; don't confuse them)

Origen e historia

Pictograph depicting something protruding upward.

Contexto cultural

Generación: All ages

Contexto social: Universal