"Dirac constant" meaning in English

{
  "etymology_text": "Named after English physicist Paul Dirac",
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  "lang_code": "en",
  "pos": "noun",
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      "glosses": [
        "Planck's constant divided by 2π, symbolized ℏ; the quantum of angular momentum and spin."
      ],
      "id": "en-Dirac_constant-en-noun-2dkLYTL7",
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        [
          "physics",
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        [
          "Planck's constant",
          "Planck's constant"
        ],
        [
          "ℏ",
          "ℏ"
        ],
        [
          "angular momentum",
          "angular momentum"
        ],
        [
          "spin",
          "spin"
        ]
      ],
      "raw_glosses": [
        "(physics) Planck's constant divided by 2π, symbolized ℏ; the quantum of angular momentum and spin."
      ],
      "synonyms": [
        {
          "word": "rationalized Planck constant"
        },
        {
          "word": "reduced Planck constant"
        },
        {
          "word": "h bar"
        }
      ],
      "topics": [
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    }
  ],
  "word": "Dirac constant"
}

{
  "etymology_text": "Named after English physicist Paul Dirac",
  "head_templates": [
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      "expansion": "Dirac constant",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        "en:Physical constants",
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      "glosses": [
        "Planck's constant divided by 2π, symbolized ℏ; the quantum of angular momentum and spin."
      ],
      "links": [
        [
          "physics",
          "physics"
        ],
        [
          "Planck's constant",
          "Planck's constant"
        ],
        [
          "ℏ",
          "ℏ"
        ],
        [
          "angular momentum",
          "angular momentum"
        ],
        [
          "spin",
          "spin"
        ]
      ],
      "raw_glosses": [
        "(physics) Planck's constant divided by 2π, symbolized ℏ; the quantum of angular momentum and spin."
      ],
      "topics": [
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "rationalized Planck constant"
    },
    {
      "word": "reduced Planck constant"
    },
    {
      "word": "h bar"
    }
  ],
  "word": "Dirac constant"
}