Prism most commonly means a solid geometric shape with two identical, parallel ends and flat faces, or a transparent object (often glass) that bends and splits light into colors.

Core meanings of “prism”

  • In geometry , a prism is a 3D solid with:
    • Two identical, parallel faces called bases.
    • Other faces that are parallelograms (often rectangles).
    • Examples include triangular prisms, rectangular prisms (cuboids), and hexagonal prisms.
  • In optics , a prism is a transparent block (often triangular) that:
    • Refracts (bends) light.
    • Can split white light into a spectrum of colors like a rainbow.

Other uses and figurative sense

  • In crystallography , a prism can mean a crystal form whose faces are parallel to one axis.
  • In everyday or figurative language, a “prism” can mean a medium that distorts or colors how something is seen , as in “viewing events through the prism of history.”

Quick HTML table

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Context Meaning of “prism” Example
Geometry 3D solid with two identical parallel bases and flat faces.Triangular prism, rectangular prism.
Optics Transparent object that bends and splits light into a spectrum.Glass prism making a rainbow from sunlight.
Crystallography Crystal form with faces parallel to one axis.Crystal whose side faces run parallel to its vertical axis.
Figurative language Medium that alters or colors how things are perceived.“Through the prism of memory.”
**TL;DR:** A prism is usually either a solid shape with matching parallel ends, or a transparent block that bends and splits light into colors.

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