"nigrescence" meaning in English

{
  "coordinate_terms": [
    {
      "_dis1": "0 0 0",
      "english": "becoming white",
      "word": "albescence"
    },
    {
      "_dis1": "0 0 0",
      "english": "becoming blue",
      "word": "cerulescence"
    },
    {
      "_dis1": "0 0 0",
      "english": "becoming red",
      "word": "erubescence"
    },
    {
      "_dis1": "0 0 0",
      "english": "becoming yellow",
      "word": "flavescence"
    },
    {
      "_dis1": "0 0 0",
      "english": "becoming green",
      "word": "virescence"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "nigrescens"
      },
      "expansion": "Latin nigrescens",
      "name": "der"
    }
  ],
  "etymology_text": "Mid 19th century. From Latin nigrescens, present active participle of nigrescō.",
  "forms": [
    {
      "form": "nigrescences",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "nigrescence (countable and uncountable, plural nigrescences)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "_dis1": "0 0 0",
      "word": "nigrescent"
    }
  ],
  "senses": [
    {
      "glosses": [
        "The process of becoming black or dark; blackening."
      ],
      "id": "en-nigrescence-en-noun-cD~AeecC",
      "links": [
        [
          "process",
          "process"
        ],
        [
          "black",
          "black"
        ],
        [
          "blackening",
          "blackening"
        ]
      ],
      "tags": [
        "countable",
        "uncountable"
      ]
    },
    {
      "glosses": [
        "A dark complexion."
      ],
      "id": "en-nigrescence-en-noun-XRNHZEo7",
      "links": [
        [
          "complexion",
          "complexion"
        ]
      ],
      "tags": [
        "countable",
        "uncountable"
      ]
    },
    {
      "categories": [
        {
          "_dis": "9 5 86",
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        },
        {
          "_dis": "11 10 79",
          "kind": "other",
          "name": "English terms suffixed with -escence",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "6 7 87",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "4 4 91",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        }
      ],
      "glosses": [
        "Blackishness."
      ],
      "id": "en-nigrescence-en-noun-1W1zTggP",
      "links": [
        [
          "Blackishness",
          "blackishness"
        ]
      ],
      "tags": [
        "countable",
        "uncountable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/naɪˈɡrɛsəns/"
    },
    {
      "ipa": "/nɪˈɡrɛsəns/"
    }
  ],
  "word": "nigrescence"
}

{
  "categories": [
    "English countable nouns",
    "English entries with incorrect language header",
    "English lemmas",
    "English nouns",
    "English terms derived from Latin",
    "English terms suffixed with -escence",
    "English uncountable nouns",
    "Pages with 1 entry",
    "Pages with entries"
  ],
  "coordinate_terms": [
    {
      "english": "becoming white",
      "word": "albescence"
    },
    {
      "english": "becoming blue",
      "word": "cerulescence"
    },
    {
      "english": "becoming red",
      "word": "erubescence"
    },
    {
      "english": "becoming yellow",
      "word": "flavescence"
    },
    {
      "english": "becoming green",
      "word": "virescence"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "la",
        "3": "nigrescens"
      },
      "expansion": "Latin nigrescens",
      "name": "der"
    }
  ],
  "etymology_text": "Mid 19th century. From Latin nigrescens, present active participle of nigrescō.",
  "forms": [
    {
      "form": "nigrescences",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "nigrescence (countable and uncountable, plural nigrescences)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "word": "nigrescent"
    }
  ],
  "senses": [
    {
      "glosses": [
        "The process of becoming black or dark; blackening."
      ],
      "links": [
        [
          "process",
          "process"
        ],
        [
          "black",
          "black"
        ],
        [
          "blackening",
          "blackening"
        ]
      ],
      "tags": [
        "countable",
        "uncountable"
      ]
    },
    {
      "glosses": [
        "A dark complexion."
      ],
      "links": [
        [
          "complexion",
          "complexion"
        ]
      ],
      "tags": [
        "countable",
        "uncountable"
      ]
    },
    {
      "glosses": [
        "Blackishness."
      ],
      "links": [
        [
          "Blackishness",
          "blackishness"
        ]
      ],
      "tags": [
        "countable",
        "uncountable"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/naɪˈɡrɛsəns/"
    },
    {
      "ipa": "/nɪˈɡrɛsəns/"
    }
  ],
  "word": "nigrescence"
}