Definitions of infrared:
  • noun:   the infrared part of the electromagnetic spectrum; electromagnetic wave frequencies below the visible range
    Example: "They could sense radiation in the infrared"
  • noun:   electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves
  • adjective:   having or employing wavelengths longer than light but shorter than radio waves; lying outside the visible spectrum at its red end
    Example: "Infrared radiation"

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See infrared used in context: 30 rhymes, several books and articles.

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