"mu-meson" meaning in English

{
  "etymology_text": "From mu + meson.",
  "forms": [
    {
      "form": "mu-mesons",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "mu-meson (plural mu-mesons)",
      "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": "Subatomic particles",
          "orig": "en:Subatomic particles",
          "parents": [
            "Matter",
            "Particle physics",
            "Chemistry",
            "Nature",
            "Physics",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1965, Richard Phillips Feynman, The Character of Physical Law, M.I.T. Press, page 157:",
          "text": "One instance of an unexpected result is the mu meson and its neutrino, which was not guessed by anybody at all before it was discovered, and even today nobody yet has any method of guessing by which this would be a natural result.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A muon (kind of subatomic particle)."
      ],
      "id": "en-mu-meson-en-noun-PPJlPRqj",
      "links": [
        [
          "muon",
          "muon"
        ],
        [
          "subatomic particle",
          "subatomic particle"
        ]
      ],
      "raw_glosses": [
        "(dated) A muon (kind of subatomic particle)."
      ],
      "synonyms": [
        {
          "word": "mu meson"
        }
      ],
      "tags": [
        "dated"
      ]
    }
  ],
  "word": "mu-meson"
}

{
  "etymology_text": "From mu + meson.",
  "forms": [
    {
      "form": "mu-mesons",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "mu-meson (plural mu-mesons)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English dated terms",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Subatomic particles"
      ],
      "examples": [
        {
          "ref": "1965, Richard Phillips Feynman, The Character of Physical Law, M.I.T. Press, page 157:",
          "text": "One instance of an unexpected result is the mu meson and its neutrino, which was not guessed by anybody at all before it was discovered, and even today nobody yet has any method of guessing by which this would be a natural result.",
          "type": "quote"
        }
      ],
      "glosses": [
        "A muon (kind of subatomic particle)."
      ],
      "links": [
        [
          "muon",
          "muon"
        ],
        [
          "subatomic particle",
          "subatomic particle"
        ]
      ],
      "raw_glosses": [
        "(dated) A muon (kind of subatomic particle)."
      ],
      "tags": [
        "dated"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "mu meson"
    }
  ],
  "word": "mu-meson"
}