"Rayleigh-Taylor instability" meaning in English

{
  "etymology_text": "Named after Lord Rayleigh and G. I. Taylor.",
  "forms": [
    {
      "form": "Rayleigh-Taylor instabilities",
      "tags": [
        "plural"
      ]
    }
  ],
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      "expansion": "Rayleigh-Taylor instability (plural Rayleigh-Taylor instabilities)",
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
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          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
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          "source": "w"
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      ],
      "glosses": [
        "An instability of an interface between two fluids of different densities which occurs when the lighter fluid is pushing the heavier fluid."
      ],
      "id": "en-Rayleigh-Taylor_instability-en-noun-tzuMsg4~",
      "links": [
        [
          "instability",
          "instability"
        ],
        [
          "interface",
          "interface"
        ],
        [
          "fluid",
          "fluid"
        ],
        [
          "densities",
          "density"
        ]
      ],
      "wikipedia": [
        "Rayleigh-Taylor instability"
      ]
    }
  ],
  "word": "Rayleigh-Taylor instability"
}

{
  "etymology_text": "Named after Lord Rayleigh and G. I. Taylor.",
  "forms": [
    {
      "form": "Rayleigh-Taylor instabilities",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
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      "expansion": "Rayleigh-Taylor instability (plural Rayleigh-Taylor instabilities)",
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  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
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        "English countable nouns",
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        "English lemmas",
        "English multiword terms",
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      ],
      "glosses": [
        "An instability of an interface between two fluids of different densities which occurs when the lighter fluid is pushing the heavier fluid."
      ],
      "links": [
        [
          "instability",
          "instability"
        ],
        [
          "interface",
          "interface"
        ],
        [
          "fluid",
          "fluid"
        ],
        [
          "densities",
          "density"
        ]
      ],
      "wikipedia": [
        "Rayleigh-Taylor instability"
      ]
    }
  ],
  "word": "Rayleigh-Taylor instability"
}