"Dirac picture" meaning in English

{
  "etymology_text": "After Paul Dirac.",
  "forms": [
    {
      "form": "Dirac pictures",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Dirac picture (plural Dirac pictures)",
      "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": "topical",
          "langcode": "en",
          "name": "Quantum mechanics",
          "orig": "en:Quantum mechanics",
          "parents": [
            "Physics",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Synonym of interaction picture"
      ],
      "id": "en-Dirac_picture-en-noun-q5we8BPG",
      "links": [
        [
          "quantum mechanics",
          "quantum mechanics"
        ],
        [
          "interaction picture",
          "interaction picture#English"
        ]
      ],
      "qualifier": "quantum mechanics",
      "raw_glosses": [
        "(quantum mechanics) Synonym of interaction picture"
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "interaction picture"
        }
      ],
      "wikipedia": [
        "Paul Dirac"
      ]
    }
  ],
  "word": "Dirac picture"
}

{
  "etymology_text": "After Paul Dirac.",
  "forms": [
    {
      "form": "Dirac pictures",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "Dirac picture (plural Dirac pictures)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "en:Quantum mechanics"
      ],
      "glosses": [
        "Synonym of interaction picture"
      ],
      "links": [
        [
          "quantum mechanics",
          "quantum mechanics"
        ],
        [
          "interaction picture",
          "interaction picture#English"
        ]
      ],
      "qualifier": "quantum mechanics",
      "raw_glosses": [
        "(quantum mechanics) Synonym of interaction picture"
      ],
      "synonyms": [
        {
          "tags": [
            "synonym",
            "synonym-of"
          ],
          "word": "interaction picture"
        }
      ],
      "wikipedia": [
        "Paul Dirac"
      ]
    }
  ],
  "word": "Dirac picture"
}