"C₄" meaning in English

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  "lang_code": "en",
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          "name": "Biochemistry",
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      "examples": [
        {
          "ref": "2021, Caroline Bowsher, Alyson Tobin, Plant Biochemistry:",
          "text": "The enzyme responsible for C₄ fixation is PEP carboxylase.",
          "type": "quote"
        },
        {
          "ref": "2022, Thomas Halliday, Otherworlds, Penguin, published 2023, page 29:",
          "text": "Since C₄ plants have become more prevalent, and because they are poorer sources of nutrition, herbivores have had to adapt their feeding behaviour to the changing flora.",
          "type": "quote"
        }
      ],
      "glosses": [
        "Designating a type of photosynthesis or carbon fixation, or a plant using such a process."
      ],
      "id": "en-C₄-en-noun-IaYY94Mv",
      "links": [
        [
          "biochemistry",
          "biochemistry"
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        [
          "photosynthesis",
          "photosynthesis"
        ],
        [
          "carbon fixation",
          "carbon fixation"
        ],
        [
          "plant",
          "plant"
        ]
      ],
      "raw_glosses": [
        "(biochemistry) Designating a type of photosynthesis or carbon fixation, or a plant using such a process."
      ],
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        "uncountable"
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      "topics": [
        "biochemistry",
        "biology",
        "chemistry",
        "microbiology",
        "natural-sciences",
        "physical-sciences"
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      "wikipedia": [
        "C₄ carbon fixation"
      ]
    }
  ],
  "word": "C₄"
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  "lang_code": "en",
  "pos": "noun",
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        "en:Biochemistry"
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          "ref": "2021, Caroline Bowsher, Alyson Tobin, Plant Biochemistry:",
          "text": "The enzyme responsible for C₄ fixation is PEP carboxylase.",
          "type": "quote"
        },
        {
          "ref": "2022, Thomas Halliday, Otherworlds, Penguin, published 2023, page 29:",
          "text": "Since C₄ plants have become more prevalent, and because they are poorer sources of nutrition, herbivores have had to adapt their feeding behaviour to the changing flora.",
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        }
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      "glosses": [
        "Designating a type of photosynthesis or carbon fixation, or a plant using such a process."
      ],
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        [
          "biochemistry",
          "biochemistry"
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        [
          "photosynthesis",
          "photosynthesis"
        ],
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          "carbon fixation",
          "carbon fixation"
        ],
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          "plant",
          "plant"
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      "raw_glosses": [
        "(biochemistry) Designating a type of photosynthesis or carbon fixation, or a plant using such a process."
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        "biochemistry",
        "biology",
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      "wikipedia": [
        "C₄ carbon fixation"
      ]
    }
  ],
  "word": "C₄"
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