"mass number" meaning in English

See mass number in All languages combined, or Wiktionary

Noun

Forms: mass numbers [plural]
Etymology: Ellipsis of atomic mass number. Etymology templates: {{ellipsis|en|atomic mass number}} Ellipsis of atomic mass number Head templates: {{en-noun}} mass number (plural mass numbers)
  1. (physics, physical chemistry) The total number of protons and neutrons in an atomic nucleus. Symbol: A Tags: physical Synonyms: atomic mass number, nucleon number Related terms: atomic mass, atomic mass unit, atomic number, atomic weight Translations (number of protons and neutrons in an atomic nucleus): عَدَد كُتْلِيّ (ʕadad kutliyy) [masculine] (Arabic), масово число (masovo čislo) [neuter] (Bulgarian), nombre màssic [masculine] (Catalan), nombre de massa [masculine] (Catalan), 質量數 /质量数 (zhìliàngshù) (Chinese Mandarin), nukleontal [neuter] (Danish), massaluku (Finnish), nombre de masse [masculine] (French), მასური რიცხვი (masuri ricxvi) (Georgian), Massenzahl [feminine] (German), μαζικός αριθμός (mazikós arithmós) [neuter, plural] (Greek), nomor massa (Indonesian), numero di massa [masculine] (Italian), 질량수 (jillyangsu) (Korean), masas skaitlis [masculine] (Latvian), tau karihi (Māori), número de massa [masculine] (Portuguese), массовое число́ (massovoje čisló) [neuter] (Russian), número másico [masculine] (Spanish), número de masa [masculine] (Spanish), masstal [neuter] (Swedish), เลขมวล (Thai), ма́сове число́ (másove čysló) [neuter] (Ukrainian), số khối (Vietnamese)

Inflected forms

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          "neutron",
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          "sense": "number of protons and neutrons in an atomic nucleus",
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          "lang_code": "da",
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        },
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          "lang_code": "de",
          "sense": "number of protons and neutrons in an atomic nucleus",
          "tags": [
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          ],
          "word": "Massenzahl"
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          "code": "el",
          "lang": "Greek",
          "lang_code": "el",
          "roman": "mazikós arithmós",
          "sense": "number of protons and neutrons in an atomic nucleus",
          "tags": [
            "neuter",
            "plural"
          ],
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        },
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          "lang_code": "id",
          "sense": "number of protons and neutrons in an atomic nucleus",
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          "sense": "number of protons and neutrons in an atomic nucleus",
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          ],
          "word": "numero di massa"
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          "code": "ko",
          "lang": "Korean",
          "lang_code": "ko",
          "roman": "jillyangsu",
          "sense": "number of protons and neutrons in an atomic nucleus",
          "word": "질량수"
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          "lang": "Latvian",
          "lang_code": "lv",
          "sense": "number of protons and neutrons in an atomic nucleus",
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          "code": "mi",
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          "lang_code": "mi",
          "sense": "number of protons and neutrons in an atomic nucleus",
          "word": "tau karihi"
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        {
          "code": "pt",
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        },
        {
          "code": "ru",
          "lang": "Russian",
          "lang_code": "ru",
          "roman": "massovoje čisló",
          "sense": "number of protons and neutrons in an atomic nucleus",
          "tags": [
            "neuter"
          ],
          "word": "массовое число́"
        },
        {
          "code": "es",
          "lang": "Spanish",
          "lang_code": "es",
          "sense": "number of protons and neutrons in an atomic nucleus",
          "tags": [
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          ],
          "word": "número másico"
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          "code": "es",
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          "sense": "number of protons and neutrons in an atomic nucleus",
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          "code": "sv",
          "lang": "Swedish",
          "lang_code": "sv",
          "sense": "number of protons and neutrons in an atomic nucleus",
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          "word": "masstal"
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          "code": "th",
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          "lang_code": "th",
          "sense": "number of protons and neutrons in an atomic nucleus",
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          "code": "uk",
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          "lang_code": "uk",
          "roman": "másove čysló",
          "sense": "number of protons and neutrons in an atomic nucleus",
          "tags": [
            "neuter"
          ],
          "word": "ма́сове число́"
        },
        {
          "code": "uk",
          "lang": "Ukrainian",
          "lang_code": "uk",
          "note": "нукло́нне число́ n (nuklónne čysló, literally “nucleon number”)",
          "sense": "number of protons and neutrons in an atomic nucleus"
        },
        {
          "code": "vi",
          "lang": "Vietnamese",
          "lang_code": "vi",
          "sense": "number of protons and neutrons in an atomic nucleus",
          "word": "số khối"
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      "sense": "number of protons and neutrons in an atomic nucleus",
      "word": "massaluku"
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      "lang": "French",
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      "sense": "number of protons and neutrons in an atomic nucleus",
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      "word": "nombre de masse"
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      "code": "ka",
      "lang": "Georgian",
      "lang_code": "ka",
      "roman": "masuri ricxvi",
      "sense": "number of protons and neutrons in an atomic nucleus",
      "word": "მასური რიცხვი"
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      "code": "de",
      "lang": "German",
      "lang_code": "de",
      "sense": "number of protons and neutrons in an atomic nucleus",
      "tags": [
        "feminine"
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      "word": "Massenzahl"
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      "code": "el",
      "lang": "Greek",
      "lang_code": "el",
      "roman": "mazikós arithmós",
      "sense": "number of protons and neutrons in an atomic nucleus",
      "tags": [
        "neuter",
        "plural"
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      "word": "μαζικός αριθμός"
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      "code": "id",
      "lang": "Indonesian",
      "lang_code": "id",
      "sense": "number of protons and neutrons in an atomic nucleus",
      "word": "nomor massa"
    },
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      "lang": "Italian",
      "lang_code": "it",
      "sense": "number of protons and neutrons in an atomic nucleus",
      "tags": [
        "masculine"
      ],
      "word": "numero di massa"
    },
    {
      "code": "ko",
      "lang": "Korean",
      "lang_code": "ko",
      "roman": "jillyangsu",
      "sense": "number of protons and neutrons in an atomic nucleus",
      "word": "질량수"
    },
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      "code": "lv",
      "lang": "Latvian",
      "lang_code": "lv",
      "sense": "number of protons and neutrons in an atomic nucleus",
      "tags": [
        "masculine"
      ],
      "word": "masas skaitlis"
    },
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      "code": "mi",
      "lang": "Māori",
      "lang_code": "mi",
      "sense": "number of protons and neutrons in an atomic nucleus",
      "word": "tau karihi"
    },
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      "lang": "Portuguese",
      "lang_code": "pt",
      "sense": "number of protons and neutrons in an atomic nucleus",
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        "masculine"
      ],
      "word": "número de massa"
    },
    {
      "code": "ru",
      "lang": "Russian",
      "lang_code": "ru",
      "roman": "massovoje čisló",
      "sense": "number of protons and neutrons in an atomic nucleus",
      "tags": [
        "neuter"
      ],
      "word": "массовое число́"
    },
    {
      "code": "es",
      "lang": "Spanish",
      "lang_code": "es",
      "sense": "number of protons and neutrons in an atomic nucleus",
      "tags": [
        "masculine"
      ],
      "word": "número másico"
    },
    {
      "code": "es",
      "lang": "Spanish",
      "lang_code": "es",
      "sense": "number of protons and neutrons in an atomic nucleus",
      "tags": [
        "masculine"
      ],
      "word": "número de masa"
    },
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      "lang_code": "sv",
      "sense": "number of protons and neutrons in an atomic nucleus",
      "tags": [
        "neuter"
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      "word": "masstal"
    },
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      "code": "th",
      "lang": "Thai",
      "lang_code": "th",
      "sense": "number of protons and neutrons in an atomic nucleus",
      "word": "เลขมวล"
    },
    {
      "code": "uk",
      "lang": "Ukrainian",
      "lang_code": "uk",
      "roman": "másove čysló",
      "sense": "number of protons and neutrons in an atomic nucleus",
      "tags": [
        "neuter"
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      "word": "ма́сове число́"
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      "lang": "Ukrainian",
      "lang_code": "uk",
      "note": "нукло́нне число́ n (nuklónne čysló, literally “nucleon number”)",
      "sense": "number of protons and neutrons in an atomic nucleus"
    },
    {
      "code": "vi",
      "lang": "Vietnamese",
      "lang_code": "vi",
      "sense": "number of protons and neutrons in an atomic nucleus",
      "word": "số khối"
    }
  ],
  "word": "mass number"
}

Download raw JSONL data for mass number meaning in English (6.5kB)


This page is a part of the kaikki.org machine-readable English dictionary. This dictionary is based on structured data extracted on 2026-03-25 from the enwiktionary dump dated 2026-03-03 using wiktextract (05c257f and 9d9a410). The data shown on this site has been post-processed and various details (e.g., extra categories) removed, some information disambiguated, and additional data merged from other sources. See the raw data download page for the unprocessed wiktextract data.

If you use this data in academic research, please cite Tatu Ylonen: Wiktextract: Wiktionary as Machine-Readable Structured Data, Proceedings of the 13th Conference on Language Resources and Evaluation (LREC), pp. 1317-1325, Marseille, 20-25 June 2022. Linking to the relevant page(s) under https://kaikki.org would also be greatly appreciated.