"specific activity" meaning in English

{
  "forms": [
    {
      "form": "specific activities",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "specific activities"
      },
      "expansion": "specific activity (plural specific activities)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Physics",
          "orig": "en:Physics",
          "parents": [
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "_dis": "91 9",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "94 6",
          "kind": "topical",
          "langcode": "en",
          "name": "Radioactivity",
          "orig": "en:Radioactivity",
          "parents": [
            "Nuclear physics",
            "Radiation",
            "Physics",
            "Quantum mechanics",
            "Energy",
            "Sciences",
            "Nature",
            "All topics",
            "Fundamental"
          ],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "The activity per unit mass of a radionuclide: number of decays per unit time, per mass."
      ],
      "id": "en-specific_activity-en-noun-Lv2InKl3",
      "links": [
        [
          "physics",
          "physics"
        ],
        [
          "activity",
          "activity"
        ],
        [
          "radionuclide",
          "radionuclide"
        ]
      ],
      "raw_glosses": [
        "(physics) The activity per unit mass of a radionuclide: number of decays per unit time, per mass."
      ],
      "topics": [
        "natural-sciences",
        "physical-sciences",
        "physics"
      ],
      "translations": [
        {
          "_dis1": "100 0",
          "code": "ga",
          "lang": "Irish",
          "sense": "Translations",
          "tags": [
            "feminine"
          ],
          "word": "sainghníomhaíocht"
        },
        {
          "_dis1": "100 0",
          "code": "es",
          "lang": "Spanish",
          "sense": "Translations",
          "tags": [
            "feminine"
          ],
          "word": "actividad específica"
        }
      ]
    },
    {
      "glosses": [
        "Used other than figuratively or idiomatically: see specific, activity."
      ],
      "id": "en-specific_activity-en-noun-Vz2HkNXd",
      "links": [
        [
          "specific",
          "specific#English"
        ],
        [
          "activity",
          "activity#English"
        ]
      ]
    }
  ],
  "word": "specific activity"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English multiword terms",
    "English nouns",
    "Translation table header lacks gloss",
    "en:Radioactivity"
  ],
  "forms": [
    {
      "form": "specific activities",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "specific activities"
      },
      "expansion": "specific activity (plural specific activities)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "en:Physics"
      ],
      "glosses": [
        "The activity per unit mass of a radionuclide: number of decays per unit time, per mass."
      ],
      "links": [
        [
          "physics",
          "physics"
        ],
        [
          "activity",
          "activity"
        ],
        [
          "radionuclide",
          "radionuclide"
        ]
      ],
      "raw_glosses": [
        "(physics) The activity per unit mass of a radionuclide: number of decays per unit time, per mass."
      ],
      "topics": [
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    },
    {
      "glosses": [
        "Used other than figuratively or idiomatically: see specific, activity."
      ],
      "links": [
        [
          "specific",
          "specific#English"
        ],
        [
          "activity",
          "activity#English"
        ]
      ]
    }
  ],
  "translations": [
    {
      "code": "ga",
      "lang": "Irish",
      "sense": "Translations",
      "tags": [
        "feminine"
      ],
      "word": "sainghníomhaíocht"
    },
    {
      "code": "es",
      "lang": "Spanish",
      "sense": "Translations",
      "tags": [
        "feminine"
      ],
      "word": "actividad específica"
    }
  ],
  "word": "specific activity"
}