"linea nigra" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "linea"
      },
      "expansion": "Latin linea",
      "name": "uder"
    }
  ],
  "etymology_text": "Latin linea + nigra, \"black line\".",
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "linea nigra",
      "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",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English undefined derivations",
          "parents": [
            "Undefined derivations",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Entries with translation boxes",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Terms with Icelandic translations",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Pregnancy",
          "orig": "en:Pregnancy",
          "parents": [
            "Body",
            "Gynaecology",
            "All topics",
            "Female",
            "Medicine",
            "Fundamental",
            "Gender",
            "Biology",
            "Healthcare",
            "Psychology",
            "Sociology",
            "Sciences",
            "Health",
            "Social sciences",
            "Society"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "A dark vertical line, running up the abdomen from the pubis to the navel (though it sometimes runs further, to the top of the abdomen) that forms during pregnancy."
      ],
      "id": "en-linea_nigra-en-noun-SSfbt9XF",
      "links": [
        [
          "dark",
          "dark"
        ],
        [
          "vertical",
          "vertical"
        ],
        [
          "abdomen",
          "abdomen"
        ],
        [
          "pubis",
          "pubis"
        ],
        [
          "navel",
          "navel"
        ],
        [
          "pregnancy",
          "pregnancy"
        ]
      ],
      "translations": [
        {
          "code": "is",
          "lang": "Icelandic",
          "sense": "dark vertical line on abdomen that forms during pregnancy",
          "tags": [
            "feminine"
          ],
          "word": "sorturák"
        }
      ],
      "wikipedia": [
        "linea nigra"
      ]
    }
  ],
  "word": "linea nigra"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "linea"
      },
      "expansion": "Latin linea",
      "name": "uder"
    }
  ],
  "etymology_text": "Latin linea + nigra, \"black line\".",
  "head_templates": [
    {
      "args": {
        "1": "?"
      },
      "expansion": "linea nigra",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English nouns with unknown or uncertain plurals",
        "English terms derived from Latin",
        "English undefined derivations",
        "Entries with translation boxes",
        "Pages with 1 entry",
        "Pages with entries",
        "Terms with Icelandic translations",
        "en:Pregnancy"
      ],
      "glosses": [
        "A dark vertical line, running up the abdomen from the pubis to the navel (though it sometimes runs further, to the top of the abdomen) that forms during pregnancy."
      ],
      "links": [
        [
          "dark",
          "dark"
        ],
        [
          "vertical",
          "vertical"
        ],
        [
          "abdomen",
          "abdomen"
        ],
        [
          "pubis",
          "pubis"
        ],
        [
          "navel",
          "navel"
        ],
        [
          "pregnancy",
          "pregnancy"
        ]
      ],
      "wikipedia": [
        "linea nigra"
      ]
    }
  ],
  "translations": [
    {
      "code": "is",
      "lang": "Icelandic",
      "sense": "dark vertical line on abdomen that forms during pregnancy",
      "tags": [
        "feminine"
      ],
      "word": "sorturák"
    }
  ],
  "word": "linea nigra"
}