"segmentation clock" meaning in English

{
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    {
      "form": "segmentation clocks",
      "tags": [
        "plural"
      ]
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      "expansion": "segmentation clock (plural segmentation clocks)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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        {
          "kind": "topical",
          "langcode": "en",
          "name": "Embryology",
          "orig": "en:Embryology",
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            "Biology",
            "Developmental biology",
            "Medicine",
            "Sciences",
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      "glosses": [
        "A molecular oscillator, governed by periodic shifts in gene expression, which influences the timing of vertebrate somitogenesis."
      ],
      "id": "en-segmentation_clock-en-noun-v2AKH0B0",
      "links": [
        [
          "embryology",
          "embryology"
        ],
        [
          "oscillator",
          "oscillator"
        ],
        [
          "somitogenesis",
          "somitogenesis"
        ]
      ],
      "raw_glosses": [
        "(embryology) A molecular oscillator, governed by periodic shifts in gene expression, which influences the timing of vertebrate somitogenesis."
      ],
      "topics": [
        "embryology",
        "medicine",
        "sciences"
      ]
    }
  ],
  "word": "segmentation clock"
}

{
  "forms": [
    {
      "form": "segmentation clocks",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
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      "expansion": "segmentation clock (plural segmentation clocks)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
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        "en:Embryology"
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      "glosses": [
        "A molecular oscillator, governed by periodic shifts in gene expression, which influences the timing of vertebrate somitogenesis."
      ],
      "links": [
        [
          "embryology",
          "embryology"
        ],
        [
          "oscillator",
          "oscillator"
        ],
        [
          "somitogenesis",
          "somitogenesis"
        ]
      ],
      "raw_glosses": [
        "(embryology) A molecular oscillator, governed by periodic shifts in gene expression, which influences the timing of vertebrate somitogenesis."
      ],
      "topics": [
        "embryology",
        "medicine",
        "sciences"
      ]
    }
  ],
  "word": "segmentation clock"
}