"light water" meaning in English

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  "lang_code": "en",
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          "name": "Water",
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      "derived": [
        {
          "_dis1": "64 36",
          "word": "light water reactor"
        }
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      "glosses": [
        "Water in its standard form of H₂O, containing two protium (¹H) hydrogen atoms, as opposed to heavy water (which contains deuterium, ²H). (Natural water contains some deuterium, but not much; so it can safely be called light water.)"
      ],
      "hypernyms": [
        {
          "_dis1": "56 44",
          "word": "H2O"
        },
        {
          "_dis1": "56 44",
          "word": "water"
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        {
          "_dis1": "56 44",
          "word": "protiated water"
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          "inorganic chemistry",
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          "protium",
          "protium"
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          "hydrogen",
          "hydrogen"
        ],
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          "heavy water",
          "heavy water"
        ],
        [
          "deuterium",
          "deuterium"
        ]
      ],
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        "(inorganic chemistry) Water in its standard form of H₂O, containing two protium (¹H) hydrogen atoms, as opposed to heavy water (which contains deuterium, ²H). (Natural water contains some deuterium, but not much; so it can safely be called light water.)"
      ],
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          "_dis1": "64 36",
          "word": "heavy water"
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          "word": "semi-heavy water"
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          "word": "super-heavy water"
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          "_dis1": "56 44",
          "word": "1H2O"
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          "_dis1": "56 44",
          "word": "protium water"
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        {
          "_dis1": "56 44",
          "word": "protium oxide"
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        {
          "_dis1": "56 44",
          "word": "diprotium oxide"
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        {
          "_dis1": "56 44",
          "word": "protium monoxide"
        },
        {
          "_dis1": "56 44",
          "word": "diprotium monoxide"
        },
        {
          "_dis1": "56 44",
          "word": "protiated water"
        },
        {
          "_dis1": "56 44",
          "word": "fully-protiated water"
        },
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          "_dis1": "56 44",
          "word": "lightwater"
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          "_dis1": "56 44",
          "word": "light-water"
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        "uncountable"
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        "chemistry",
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          "ref": "2001, Roger C. Mardon, An Illustrated History of Fire Engines, page 112",
          "text": "The light water (AFFF) of the TACR was to be backed up by fluorinated protein foam instead of standard protein foam.",
          "type": "quotation"
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          "ref": "2014, John R. Ridley, Safety at Work, page 504",
          "text": "These fires can be extinguished with water spray, alcohol-resistant foam, light water, vaporising liquids (\"Halons\"), carbon dioxide and dry powder.",
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          "text": "They can be extinguished by carbon dioxide, dry powder, water spray, light water and vaporising liquid",
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      "glosses": [
        "Foam formed by water and a fluorocarbon surfactant, used in firefighting because it floats on flammable liquids lighter than water."
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      "id": "en-light_water-en-noun-c0DHTRYV",
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  "word": "light water"
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      "word": "H2O"
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      "word": "water"
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      "word": "protiated water"
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  "lang": "English",
  "lang_code": "en",
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      "word": "heavy water"
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      "word": "semi-heavy water"
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      "word": "super-heavy water"
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        "Water in its standard form of H₂O, containing two protium (¹H) hydrogen atoms, as opposed to heavy water (which contains deuterium, ²H). (Natural water contains some deuterium, but not much; so it can safely be called light water.)"
      ],
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          "protium",
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        "(inorganic chemistry) Water in its standard form of H₂O, containing two protium (¹H) hydrogen atoms, as opposed to heavy water (which contains deuterium, ²H). (Natural water contains some deuterium, but not much; so it can safely be called light water.)"
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  "synonyms": [
    {
      "word": "1H2O"
    },
    {
      "word": "protium water"
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    {
      "word": "protium oxide"
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    {
      "word": "diprotium oxide"
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      "word": "protium monoxide"
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      "word": "diprotium monoxide"
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      "word": "protiated water"
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      "word": "lightwater"
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      "word": "light-water"
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  "word": "light water"
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