"growth medium" meaning in English

{
  "forms": [
    {
      "form": "growth media",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "growth media"
      },
      "expansion": "growth medium (plural growth media)",
      "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",
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          "source": "w"
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          "source": "w"
        },
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          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Microbiology",
          "orig": "en:Microbiology",
          "parents": [
            "Biology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A culture medium."
      ],
      "id": "en-growth_medium-en-noun-j3s6W8wA",
      "links": [
        [
          "microbiology",
          "microbiology"
        ],
        [
          "culture medium",
          "culture medium"
        ]
      ],
      "raw_glosses": [
        "(microbiology) A culture medium."
      ],
      "topics": [
        "biology",
        "microbiology",
        "natural-sciences"
      ],
      "wikipedia": [
        "growth medium"
      ]
    }
  ],
  "word": "growth medium"
}

{
  "forms": [
    {
      "form": "growth media",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "growth media"
      },
      "expansion": "growth medium (plural growth media)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
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        "English nouns",
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        "en:Microbiology"
      ],
      "glosses": [
        "A culture medium."
      ],
      "links": [
        [
          "microbiology",
          "microbiology"
        ],
        [
          "culture medium",
          "culture medium"
        ]
      ],
      "raw_glosses": [
        "(microbiology) A culture medium."
      ],
      "topics": [
        "biology",
        "microbiology",
        "natural-sciences"
      ],
      "wikipedia": [
        "growth medium"
      ]
    }
  ],
  "word": "growth medium"
}