{
    "term": "radiation",
    "partOfSpeech": "noun",
    "ox5000": true,
    "cefr": "b2",
    "definitions": [
        {
            "senseNumber": 1,
            "definition": "powerful and very dangerous rays that are sent out from radioactive substances",
            "cefr": "b2",
            "examples": [
                {
                    "text": "high **levels/doses of radiation** that damage cells"
                },
                {
                    "text": "the link between exposure to radiation and childhood cancer"
                },
                {
                    "text": "a radiation leak from a nuclear power station"
                },
                {
                    "text": "radiation sickness"
                },
                {
                    "text": "the radiations emitted by radium"
                },
                {
                    "text": "Nuclear testing has exposed millions of people to radiation."
                },
                {
                    "text": "The counter showed high levels of radiation."
                }
            ],
            "topics": ["Physics and chemistry"],
            "collocations": {
                "adjective": ["background", "low-level", "damaging"],
                "… of radiation": ["dose"],
                "verb + radiation": ["emit", "give off", "absorb"],
                "radiation + verb": ["leak", "leak out"],
                "radiation + noun": ["sickness", "dose", "level"],
                "preposition": ["radiation from"],
                "phrases": ["levels of radiation"]
            }
        },
        {
            "senseNumber": 2,
            "definition": "heat, energy, etc. that is sent out in the form of rays",
            "cefr": "b2",
            "examples": [
                {
                    "text": "ultraviolet radiation"
                },
                {
                    "text": "electromagnetic radiation from power lines"
                },
                {
                    "text": "The ozone layer absorbs solar radiation."
                }
            ],
            "topics": ["Physics and chemistry"],
            "collocations": {
                "adjective": ["background", "low-level", "damaging"],
                "… of radiation": ["dose"],
                "verb + radiation": ["emit", "give off", "absorb"],
                "radiation + verb": ["leak", "leak out"],
                "radiation + noun": ["sickness", "dose", "level"],
                "preposition": ["radiation from"],
                "phrases": ["levels of radiation"]
            }
        },
        {
            "senseNumber": 3,
            "definition": "the treatment of cancer and other diseases using radiation",
            "examples": [],
            "collocations": {
                "adjective": ["background", "low-level", "damaging"],
                "… of radiation": ["dose"],
                "verb + radiation": ["emit", "give off", "absorb"],
                "radiation + verb": ["leak", "leak out"],
                "radiation + noun": ["sickness", "dose", "level"],
                "preposition": ["radiation from"],
                "phrases": ["levels of radiation"]
            }
        }
    ],
    "pronunciations": {
        "uk": [
            {
                "pronunciation": "/ˌreɪdiˈeɪʃn/",
                "audio": "ra/radiation/radiation__gb_1.mp3"
            }
        ],
        "us": [
            {
                "pronunciation": "/ˌreɪdiˈeɪʃn/",
                "audio": "ra/radiation/radiation__us_1.mp3"
            }
        ]
    },
    "wordOrigin": "late Middle English (denoting the action of sending out rays of light): from Latin radiatio(n-), from radiare ‘emit rays’, from radius ‘ray, spoke’."
}