"quantum of action" meaning in All languages combined

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  "lang_code": "en",
  "pos": "noun",
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      "glosses": [
        "Synonym of Planck's constant"
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      "id": "en-quantum_of_action-en-noun-S9ZVW2U6",
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        "(dated) Synonym of Planck's constant"
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  "word": "quantum of action"
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  "lang_code": "en",
  "pos": "noun",
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        "(dated) Synonym of Planck's constant"
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  "word": "quantum of action"
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