"melena" meaning in Italian

{
  "etymology_templates": [
    {
      "args": {
        "1": "it",
        "2": "grc",
        "3": "μέλαινα",
        "t": "black"
      },
      "expansion": "Ancient Greek μέλαινα (mélaina, “black”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Ancient Greek μέλαινα (mélaina, “black”).",
  "forms": [
    {
      "form": "melene",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "melena f (plural melene)",
      "name": "it-noun"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Italian entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "it",
          "name": "Pathology",
          "orig": "it:Pathology",
          "parents": [
            "Medicine",
            "Biology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "melena"
      ],
      "id": "en-melena-it-noun-I46IYEgI",
      "links": [
        [
          "pathology",
          "pathology"
        ],
        [
          "melena",
          "melena#English"
        ]
      ],
      "raw_glosses": [
        "(pathology) melena"
      ],
      "tags": [
        "feminine"
      ],
      "topics": [
        "medicine",
        "pathology",
        "sciences"
      ],
      "wikipedia": [
        "it:melena"
      ]
    }
  ],
  "word": "melena"
}

{
  "categories": [
    "es:Hair"
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "it",
        "2": "grc",
        "3": "μέλαινα",
        "t": "black"
      },
      "expansion": "Ancient Greek μέλαινα (mélaina, “black”)",
      "name": "der"
    }
  ],
  "etymology_text": "From Ancient Greek μέλαινα (mélaina, “black”).",
  "forms": [
    {
      "form": "melene",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "melena f (plural melene)",
      "name": "it-noun"
    }
  ],
  "lang": "Italian",
  "lang_code": "it",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Italian countable nouns",
        "Italian entries with incorrect language header",
        "Italian feminine nouns",
        "Italian lemmas",
        "Italian nouns",
        "Italian terms derived from Ancient Greek",
        "it:Pathology"
      ],
      "glosses": [
        "melena"
      ],
      "links": [
        [
          "pathology",
          "pathology"
        ],
        [
          "melena",
          "melena#English"
        ]
      ],
      "raw_glosses": [
        "(pathology) melena"
      ],
      "tags": [
        "feminine"
      ],
      "topics": [
        "medicine",
        "pathology",
        "sciences"
      ],
      "wikipedia": [
        "it:melena"
      ]
    }
  ],
  "word": "melena"
}