"figure étymologique" meaning in French

{
  "forms": [
    {
      "form": "figures étymologiques",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "figure étymologique f (plural figures étymologiques)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "French entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "fr",
          "name": "Figures of speech",
          "orig": "fr:Figures of speech",
          "parents": [
            "Rhetoric",
            "Language",
            "Communication",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "figura etymologica (multiword figure of speech in which two or more different words are etymologically related)"
      ],
      "id": "en-figure_étymologique-fr-noun-wBWnE35s",
      "links": [
        [
          "figura etymologica",
          "figura etymologica"
        ]
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/fi.ɡy.ʁ‿e.ti.mɔ.lɔ.ʒik/"
    }
  ],
  "word": "figure étymologique"
}

{
  "forms": [
    {
      "form": "figures étymologiques",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "figure étymologique f (plural figures étymologiques)",
      "name": "fr-noun"
    }
  ],
  "lang": "French",
  "lang_code": "fr",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "French countable nouns",
        "French entries with incorrect language header",
        "French feminine nouns",
        "French lemmas",
        "French multiword terms",
        "French nouns",
        "French nouns with red links in their headword lines",
        "French terms with IPA pronunciation",
        "Pages with 1 entry",
        "Pages with entries",
        "fr:Figures of speech"
      ],
      "glosses": [
        "figura etymologica (multiword figure of speech in which two or more different words are etymologically related)"
      ],
      "links": [
        [
          "figura etymologica",
          "figura etymologica"
        ]
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/fi.ɡy.ʁ‿e.ti.mɔ.lɔ.ʒik/"
    }
  ],
  "word": "figure étymologique"
}