prism

A noun referring to a solid geometric figure with two parallel, congruent polygonal bases and rectangular lateral faces, or an optical device made of glass or quartz used to refract light, separate it into its constituent colors, or invert an image.

• 🇨🇳指具有两个平行且全等的多边形底面和矩形侧面的几何体，也指用玻璃或石英制成的光学装置，用于折射光线、将光分解成组成颜色或翻转图像。

1. Geometric solid B2 formal scientific

   A polyhedron with two congruent and parallel faces (the bases) and whose lateral faces are parallelograms.

   • A rectangular prism has six faces, all of which are rectangles.
   • The teacher used a model of a triangular prism to explain volume.
   • In geometry class, we calculated the surface area of a hexagonal prism.

   🇨🇳几何体

2. Optical device B1 formal scientific

   A transparent object, often triangular in shape, that refracts light, separating it into its constituent colors or changing its direction.

   • A glass prism splits white light into a rainbow of colors.
   • The scientist used a prism to study the spectrum of the light source.
   • Prisms are used in binoculars to invert and correct the image.

   🇨🇳光学装置

• prisms plural form
• prisms' possessive plural form
• prism's possessive singular form