"lanthanium" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "grc",
        "3": "λανθάνω",
        "4": "",
        "5": "to escape notice"
      },
      "expansion": "Ancient Greek λανθάνω (lanthánō, “to escape notice”)",
      "name": "uder"
    },
    {
      "args": {
        "1": "en",
        "2": "",
        "3": "ium",
        "gloss2": "a chemical element"
      },
      "expansion": "+ -ium (“a chemical element”)",
      "name": "suffix"
    }
  ],
  "etymology_text": "From Ancient Greek λανθάνω (lanthánō, “to escape notice”), because it had gone long undetected in mineral ores; + -ium (“a chemical element”).",
  "forms": [
    {
      "form": "lanthaniums",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "lanthanium (countable and uncountable, plural lanthaniums)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "lanthanum"
        }
      ],
      "categories": [
        {
          "kind": "other",
          "name": "British English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English terms suffixed with -ium",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English undefined derivations",
          "parents": [
            "Undefined derivations",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 2 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Lanthanum",
          "orig": "en:Lanthanum",
          "parents": [
            "Lanthanide series chemical elements",
            "Chemical elements",
            "Matter",
            "Chemistry",
            "Nature",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Alternative form of lanthanum"
      ],
      "id": "en-lanthanium-en-noun-tMK5Vfbk",
      "links": [
        [
          "lanthanum",
          "lanthanum#English"
        ]
      ],
      "raw_glosses": [
        "(UK) Alternative form of lanthanum"
      ],
      "tags": [
        "UK",
        "alt-of",
        "alternative",
        "countable",
        "uncountable"
      ]
    }
  ],
  "word": "lanthanium"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "grc",
        "3": "λανθάνω",
        "4": "",
        "5": "to escape notice"
      },
      "expansion": "Ancient Greek λανθάνω (lanthánō, “to escape notice”)",
      "name": "uder"
    },
    {
      "args": {
        "1": "en",
        "2": "",
        "3": "ium",
        "gloss2": "a chemical element"
      },
      "expansion": "+ -ium (“a chemical element”)",
      "name": "suffix"
    }
  ],
  "etymology_text": "From Ancient Greek λανθάνω (lanthánō, “to escape notice”), because it had gone long undetected in mineral ores; + -ium (“a chemical element”).",
  "forms": [
    {
      "form": "lanthaniums",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "~"
      },
      "expansion": "lanthanium (countable and uncountable, plural lanthaniums)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "alt_of": [
        {
          "word": "lanthanum"
        }
      ],
      "categories": [
        "British English",
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms derived from Ancient Greek",
        "English terms suffixed with -ium",
        "English uncountable nouns",
        "English undefined derivations",
        "Pages with 2 entries",
        "Pages with entries",
        "en:Lanthanum"
      ],
      "glosses": [
        "Alternative form of lanthanum"
      ],
      "links": [
        [
          "lanthanum",
          "lanthanum#English"
        ]
      ],
      "raw_glosses": [
        "(UK) Alternative form of lanthanum"
      ],
      "tags": [
        "UK",
        "alt-of",
        "alternative",
        "countable",
        "uncountable"
      ]
    }
  ],
  "word": "lanthanium"
}