"IR radiation" meaning in Anglais

{
  "categories": [
    {
      "kind": "other",
      "name": "Locutions nominales en anglais",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Anglais",
      "orig": "anglais",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "Composé de IR (même sens) et de light (« lumière »)."
  ],
  "forms": [
    {
      "form": "IR radiations",
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "related": [
    {
      "word": "ultraviolet"
    },
    {
      "word": "UV"
    },
    {
      "word": "ultraviolet light"
    },
    {
      "word": "UV light"
    },
    {
      "word": "ultraviolet radiation"
    },
    {
      "word": "UV radiation"
    }
  ],
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en anglais de la physique",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Noms indénombrables en anglais",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Infrarouge (rayonnement)."
      ],
      "id": "fr-IR_radiation-en-noun-x~9P~Y5o",
      "tags": [
        "physical",
        "uncountable"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "infrared"
    },
    {
      "word": "IR"
    },
    {
      "word": "infrared light"
    },
    {
      "word": "IR light"
    },
    {
      "word": "infratred radiation"
    }
  ],
  "word": "IR radiation"
}

{
  "categories": [
    "Locutions nominales en anglais",
    "anglais"
  ],
  "etymology_texts": [
    "Composé de IR (même sens) et de light (« lumière »)."
  ],
  "forms": [
    {
      "form": "IR radiations",
      "tags": [
        "plural"
      ]
    }
  ],
  "lang": "Anglais",
  "lang_code": "en",
  "pos": "noun",
  "pos_title": "Locution nominale",
  "related": [
    {
      "word": "ultraviolet"
    },
    {
      "word": "UV"
    },
    {
      "word": "ultraviolet light"
    },
    {
      "word": "UV light"
    },
    {
      "word": "ultraviolet radiation"
    },
    {
      "word": "UV radiation"
    }
  ],
  "senses": [
    {
      "categories": [
        "Lexique en anglais de la physique",
        "Noms indénombrables en anglais"
      ],
      "glosses": [
        "Infrarouge (rayonnement)."
      ],
      "tags": [
        "physical",
        "uncountable"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "infrared"
    },
    {
      "word": "IR"
    },
    {
      "word": "infrared light"
    },
    {
      "word": "IR light"
    },
    {
      "word": "infratred radiation"
    }
  ],
  "word": "IR radiation"
}