"λούμεν" meaning in Greek

{
  "etymology_templates": [
    {
      "args": {
        "1": "el",
        "2": "la",
        "3": "lumen"
      },
      "expansion": "Latin lumen",
      "name": "bor"
    }
  ],
  "etymology_text": "Borrowed from Latin lumen.",
  "forms": [
    {
      "form": "loúmen",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "el",
        "10": "",
        "11": "",
        "12": "",
        "13": "",
        "14": "",
        "15": "",
        "16": "",
        "17": "",
        "18": "",
        "19": "",
        "2": "nouns",
        "20": "",
        "21": "",
        "22": "",
        "23": "",
        "24": "",
        "25": "",
        "26": "",
        "27": "",
        "28": "",
        "3": "indeclinable",
        "4": "",
        "5": "",
        "6": "inv",
        "7": "",
        "8": "",
        "9": "",
        "cat2": "",
        "cat3": "",
        "cat4": "indeclinable nouns",
        "g": "n",
        "g2": "",
        "g3": "",
        "head": "",
        "sort": "",
        "tr2": "",
        "ts": ""
      },
      "expansion": "λούμεν • (loúmen) n (indeclinable)",
      "name": "head"
    },
    {
      "args": {
        "1": "n",
        "2": "inv"
      },
      "expansion": "λούμεν • (loúmen) n (indeclinable)",
      "name": "el-noun"
    }
  ],
  "lang": "Greek",
  "lang_code": "el",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Greek 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": "el",
          "name": "Physics",
          "orig": "el:Physics",
          "parents": [
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "el",
          "name": "SI units",
          "orig": "el:SI units",
          "parents": [
            "Units of measure",
            "Metrology",
            "Quantity",
            "Applied sciences",
            "Mathematics",
            "Sciences",
            "Formal sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "lumen (the derived SI unit of luminous flux)"
      ],
      "id": "en-λούμεν-el-noun-Nk2In40c",
      "links": [
        [
          "physics",
          "physics"
        ],
        [
          "lumen",
          "lumen"
        ]
      ],
      "raw_glosses": [
        "(physics) lumen (the derived SI unit of luminous flux)"
      ],
      "related": [
        {
          "english": "luminous flux",
          "roman": "foteiní roḯ",
          "tags": [
            "feminine"
          ],
          "word": "φωτεινή ροή"
        }
      ],
      "tags": [
        "indeclinable"
      ],
      "topics": [
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    }
  ],
  "word": "λούμεν"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "el",
        "2": "la",
        "3": "lumen"
      },
      "expansion": "Latin lumen",
      "name": "bor"
    }
  ],
  "etymology_text": "Borrowed from Latin lumen.",
  "forms": [
    {
      "form": "loúmen",
      "tags": [
        "romanization"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "el",
        "10": "",
        "11": "",
        "12": "",
        "13": "",
        "14": "",
        "15": "",
        "16": "",
        "17": "",
        "18": "",
        "19": "",
        "2": "nouns",
        "20": "",
        "21": "",
        "22": "",
        "23": "",
        "24": "",
        "25": "",
        "26": "",
        "27": "",
        "28": "",
        "3": "indeclinable",
        "4": "",
        "5": "",
        "6": "inv",
        "7": "",
        "8": "",
        "9": "",
        "cat2": "",
        "cat3": "",
        "cat4": "indeclinable nouns",
        "g": "n",
        "g2": "",
        "g3": "",
        "head": "",
        "sort": "",
        "tr2": "",
        "ts": ""
      },
      "expansion": "λούμεν • (loúmen) n (indeclinable)",
      "name": "head"
    },
    {
      "args": {
        "1": "n",
        "2": "inv"
      },
      "expansion": "λούμεν • (loúmen) n (indeclinable)",
      "name": "el-noun"
    }
  ],
  "lang": "Greek",
  "lang_code": "el",
  "pos": "noun",
  "related": [
    {
      "english": "luminous flux",
      "roman": "foteiní roḯ",
      "tags": [
        "feminine"
      ],
      "word": "φωτεινή ροή"
    }
  ],
  "senses": [
    {
      "categories": [
        "Greek entries with incorrect language header",
        "Greek indeclinable nouns",
        "Greek lemmas",
        "Greek neuter nouns",
        "Greek nouns",
        "Greek terms borrowed from Latin",
        "Greek terms derived from Latin",
        "Pages with 1 entry",
        "Pages with entries",
        "el:Physics",
        "el:SI units"
      ],
      "glosses": [
        "lumen (the derived SI unit of luminous flux)"
      ],
      "links": [
        [
          "physics",
          "physics"
        ],
        [
          "lumen",
          "lumen"
        ]
      ],
      "raw_glosses": [
        "(physics) lumen (the derived SI unit of luminous flux)"
      ],
      "tags": [
        "indeclinable"
      ],
      "topics": [
        "natural-sciences",
        "physical-sciences",
        "physics"
      ]
    }
  ],
  "word": "λούμεν"
}