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.

• 🌐اسم يدل على جسم هندسي له قاعدتان متوازيتان متطابقتان على شكل مضلعين وأوجه جانبية مستطيلة، أو على جهاز بصري مصنوع من الزجاج أو الكوارتز يُستخدم لكسر الضوء وفصله إلى ألوانه المكونة أو لقلب الصورة.

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.

   🌐مجسم هندسي

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.

   🌐جهاز بصري

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