"reaction mass" meaning in English

{
  "forms": [
    {
      "form": "reaction masses",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "reaction mass (plural reaction masses)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [],
      "examples": [
        {
          "ref": "1984, Chemical Engineering:",
          "text": "A small rise in the temperature of the reaction mass increases the reaction rate, which further increases the temperature of the mass.",
          "type": "quote"
        },
        {
          "ref": "1981, Willard F. Libby, Talking to People, →ISBN:",
          "text": "Our proposal involves the use of liquid core fission reactors to heat reaction mass, probably hydrogen, to stellar temperatures; ...",
          "type": "quote"
        },
        {
          "ref": "1966, Robert Anson Heinlein, The Moon is a Harsh Mistress, Putnam Publishing Group:",
          "text": "But hydrogen is expensive in Luna and any mass could be reaction mass; it just would not be as efficient.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Fuel for nuclear energy."
      ],
      "id": "en-reaction_mass-en-noun-JrTGQ7Ps",
      "links": [
        [
          "Fuel",
          "fuel#English"
        ],
        [
          "nuclear energy",
          "nuclear energy#English"
        ]
      ]
    },
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Aerospace",
          "orig": "en:Aerospace",
          "parents": [
            "Aeronautics",
            "Astronautics",
            "Sciences",
            "Space",
            "Applied sciences",
            "All topics",
            "Nature",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "6 94",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
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          "source": "w+disamb"
        },
        {
          "_dis": "6 94",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "4 96",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Working mass."
      ],
      "id": "en-reaction_mass-en-noun-9WqChASI",
      "links": [
        [
          "aerospace",
          "aerospace"
        ],
        [
          "Working mass",
          "working mass#English"
        ]
      ],
      "raw_glosses": [
        "(aerospace) Working mass."
      ],
      "topics": [
        "aerospace",
        "business",
        "engineering",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "reaction mass"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "forms": [
    {
      "form": "reaction masses",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "reaction mass (plural reaction masses)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English terms with quotations",
        "Quotation templates to be cleaned"
      ],
      "examples": [
        {
          "ref": "1984, Chemical Engineering:",
          "text": "A small rise in the temperature of the reaction mass increases the reaction rate, which further increases the temperature of the mass.",
          "type": "quote"
        },
        {
          "ref": "1981, Willard F. Libby, Talking to People, →ISBN:",
          "text": "Our proposal involves the use of liquid core fission reactors to heat reaction mass, probably hydrogen, to stellar temperatures; ...",
          "type": "quote"
        },
        {
          "ref": "1966, Robert Anson Heinlein, The Moon is a Harsh Mistress, Putnam Publishing Group:",
          "text": "But hydrogen is expensive in Luna and any mass could be reaction mass; it just would not be as efficient.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Fuel for nuclear energy."
      ],
      "links": [
        [
          "Fuel",
          "fuel#English"
        ],
        [
          "nuclear energy",
          "nuclear energy#English"
        ]
      ]
    },
    {
      "categories": [
        "en:Aerospace"
      ],
      "glosses": [
        "Working mass."
      ],
      "links": [
        [
          "aerospace",
          "aerospace"
        ],
        [
          "Working mass",
          "working mass#English"
        ]
      ],
      "raw_glosses": [
        "(aerospace) Working mass."
      ],
      "topics": [
        "aerospace",
        "business",
        "engineering",
        "natural-sciences",
        "physical-sciences"
      ]
    }
  ],
  "word": "reaction mass"
}