"retroplacental" meaning in English

{
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        "1": "en",
        "2": "retro",
        "3": "placental"
      },
      "expansion": "retro + placental",
      "name": "compound"
    }
  ],
  "etymology_text": "From retro + placental.",
  "forms": [
    {
      "form": "more retroplacental",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most retroplacental",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "retroplacental (comparative more retroplacental, superlative most retroplacental)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "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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          "langcode": "en",
          "name": "Anatomy",
          "orig": "en:Anatomy",
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            "Medicine",
            "Sciences",
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            "Health",
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        }
      ],
      "glosses": [
        "Between the placenta and myometrium"
      ],
      "id": "en-retroplacental-en-adj-XRgdQ6B7",
      "links": [
        [
          "anatomy",
          "anatomy"
        ],
        [
          "placenta",
          "placenta"
        ],
        [
          "myometrium",
          "myometrium"
        ]
      ],
      "raw_glosses": [
        "(anatomy) Between the placenta and myometrium"
      ],
      "topics": [
        "anatomy",
        "medicine",
        "sciences"
      ]
    }
  ],
  "word": "retroplacental"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "retro",
        "3": "placental"
      },
      "expansion": "retro + placental",
      "name": "compound"
    }
  ],
  "etymology_text": "From retro + placental.",
  "forms": [
    {
      "form": "more retroplacental",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most retroplacental",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "retroplacental (comparative more retroplacental, superlative most retroplacental)",
      "name": "en-adj"
    }
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  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
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      "glosses": [
        "Between the placenta and myometrium"
      ],
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          "anatomy",
          "anatomy"
        ],
        [
          "placenta",
          "placenta"
        ],
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          "myometrium",
          "myometrium"
        ]
      ],
      "raw_glosses": [
        "(anatomy) Between the placenta and myometrium"
      ],
      "topics": [
        "anatomy",
        "medicine",
        "sciences"
      ]
    }
  ],
  "word": "retroplacental"
}