"atomic mass number" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "atomic mass",
        "3": "number"
      },
      "expansion": "atomic mass + number",
      "name": "compound"
    }
  ],
  "etymology_text": "From atomic mass + number.",
  "forms": [
    {
      "form": "atomic mass numbers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "atomic mass number (plural atomic mass numbers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Nuclear physics",
          "orig": "en:Nuclear physics",
          "parents": [
            "Physics",
            "Quantum mechanics",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Physical chemistry",
          "orig": "en:Physical chemistry",
          "parents": [
            "Chemistry",
            "Physics",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Physical quantities",
          "orig": "en:Physical quantities",
          "parents": [
            "Physics",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Physics",
          "orig": "en:Physics",
          "parents": [
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "A"
        },
        {
          "word": "mass number"
        }
      ],
      "glosses": [
        "Pedantic form of mass number. Symbol: A."
      ],
      "id": "en-atomic_mass_number-en-noun-21xnmdeq",
      "links": [
        [
          "physics",
          "physics"
        ],
        [
          "physical chemistry",
          "physical chemistry"
        ],
        [
          "mass number",
          "mass number#English"
        ],
        [
          "A",
          "A#Translingual"
        ]
      ],
      "raw_glosses": [
        "(physics, physical chemistry, dated) Pedantic form of mass number. Symbol: A."
      ],
      "related": [
        {
          "word": "A"
        },
        {
          "word": "AMU"
        },
        {
          "word": "atomic mass"
        },
        {
          "word": "atomic mass unit"
        },
        {
          "word": "atomic number"
        },
        {
          "word": "atomic weight"
        },
        {
          "word": "mass number"
        }
      ],
      "synonyms": [
        {
          "word": "A"
        },
        {
          "word": "mass number"
        },
        {
          "word": "nucleon number"
        }
      ],
      "tags": [
        "dated",
        "physical"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    }
  ],
  "word": "atomic mass number"
}

{
  "derived": [
    {
      "word": "A"
    },
    {
      "word": "mass number"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "atomic mass",
        "3": "number"
      },
      "expansion": "atomic mass + number",
      "name": "compound"
    }
  ],
  "etymology_text": "From atomic mass + number.",
  "forms": [
    {
      "form": "atomic mass numbers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "atomic mass number (plural atomic mass numbers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "A"
    },
    {
      "word": "AMU"
    },
    {
      "word": "atomic mass"
    },
    {
      "word": "atomic mass unit"
    },
    {
      "word": "atomic number"
    },
    {
      "word": "atomic weight"
    },
    {
      "word": "mass number"
    }
  ],
  "senses": [
    {
      "categories": [
        "English compound terms",
        "English countable nouns",
        "English dated terms",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Nuclear physics",
        "en:Physical chemistry",
        "en:Physical quantities",
        "en:Physics"
      ],
      "glosses": [
        "Pedantic form of mass number. Symbol: A."
      ],
      "links": [
        [
          "physics",
          "physics"
        ],
        [
          "physical chemistry",
          "physical chemistry"
        ],
        [
          "mass number",
          "mass number#English"
        ],
        [
          "A",
          "A#Translingual"
        ]
      ],
      "raw_glosses": [
        "(physics, physical chemistry, dated) Pedantic form of mass number. Symbol: A."
      ],
      "tags": [
        "dated",
        "physical"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "A"
    },
    {
      "word": "mass number"
    },
    {
      "word": "nucleon number"
    }
  ],
  "word": "atomic mass number"
}