"nigra nano" meaning in Esperanto

{
  "etymology_templates": [
    {
      "args": {
        "1": "eo",
        "2": "nigra",
        "3": "nano",
        "t1": "black",
        "t2": "dwarf"
      },
      "expansion": "nigra (“black”) + nano (“dwarf”)",
      "name": "affix"
    }
  ],
  "etymology_text": "nigra (“black”) + nano (“dwarf”)",
  "forms": [
    {
      "form": "nigran nanon",
      "tags": [
        "accusative",
        "singular"
      ]
    },
    {
      "form": "nigraj nanoj",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "nigrajn nanojn",
      "tags": [
        "accusative",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "nigra nano (accusative singular nigran nanon, plural nigraj nanoj, accusative plural nigrajn nanojn)",
      "name": "eo-head"
    }
  ],
  "hyphenation": [
    "ni‧gra"
  ],
  "lang": "Esperanto",
  "lang_code": "eo",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Esperanto 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": "eo",
          "name": "Astronomy",
          "orig": "eo:Astronomy",
          "parents": [
            "Sciences",
            "Space",
            "All topics",
            "Nature",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "black dwarf"
      ],
      "id": "en-nigra_nano-eo-noun-TQxlRODf",
      "links": [
        [
          "astronomy",
          "astronomy"
        ],
        [
          "black dwarf",
          "black dwarf#English"
        ]
      ],
      "raw_glosses": [
        "(astronomy) black dwarf"
      ],
      "related": [
        {
          "word": "bruna nano"
        },
        {
          "word": "blanka nano"
        },
        {
          "word": "glacia nano"
        },
        {
          "word": "ruĝa nano"
        }
      ],
      "topics": [
        "astronomy",
        "natural-sciences"
      ],
      "wikipedia": [
        "eo:nigra nano"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈniɡra ˈnano]"
    },
    {
      "rhymes": "-ano"
    }
  ],
  "word": "nigra nano"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "eo",
        "2": "nigra",
        "3": "nano",
        "t1": "black",
        "t2": "dwarf"
      },
      "expansion": "nigra (“black”) + nano (“dwarf”)",
      "name": "affix"
    }
  ],
  "etymology_text": "nigra (“black”) + nano (“dwarf”)",
  "forms": [
    {
      "form": "nigran nanon",
      "tags": [
        "accusative",
        "singular"
      ]
    },
    {
      "form": "nigraj nanoj",
      "tags": [
        "plural"
      ]
    },
    {
      "form": "nigrajn nanojn",
      "tags": [
        "accusative",
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "nigra nano (accusative singular nigran nanon, plural nigraj nanoj, accusative plural nigrajn nanojn)",
      "name": "eo-head"
    }
  ],
  "hyphenation": [
    "ni‧gra"
  ],
  "lang": "Esperanto",
  "lang_code": "eo",
  "pos": "noun",
  "related": [
    {
      "word": "bruna nano"
    },
    {
      "word": "blanka nano"
    },
    {
      "word": "glacia nano"
    },
    {
      "word": "ruĝa nano"
    }
  ],
  "senses": [
    {
      "categories": [
        "Esperanto compound terms",
        "Esperanto entries with incorrect language header",
        "Esperanto lemmas",
        "Esperanto multiword terms",
        "Esperanto nouns",
        "Esperanto terms with IPA pronunciation",
        "Pages with 1 entry",
        "Pages with entries",
        "Rhymes:Esperanto/ano",
        "eo:Astronomy"
      ],
      "glosses": [
        "black dwarf"
      ],
      "links": [
        [
          "astronomy",
          "astronomy"
        ],
        [
          "black dwarf",
          "black dwarf#English"
        ]
      ],
      "raw_glosses": [
        "(astronomy) black dwarf"
      ],
      "topics": [
        "astronomy",
        "natural-sciences"
      ],
      "wikipedia": [
        "eo:nigra nano"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "[ˈniɡra ˈnano]"
    },
    {
      "rhymes": "-ano"
    }
  ],
  "word": "nigra nano"
}