"vanadous" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "vanadium",
        "3": "ous"
      },
      "expansion": "vanadium + -ous",
      "name": "suffix"
    }
  ],
  "etymology_text": "From vanadium + -ous.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "adjective"
      },
      "expansion": "vanadous",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        {
          "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 -ous",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Vanadium",
          "orig": "en:Vanadium",
          "parents": [
            "Transition metals",
            "Chemical elements",
            "Metals",
            "Matter",
            "Metallurgy",
            "Chemistry",
            "Nature",
            "Technology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "vanadous acid"
        }
      ],
      "glosses": [
        "Of, pertaining to or containing vanadium, especially in an oxidation number of 4."
      ],
      "id": "en-vanadous-en-adj-l2fWzxjO",
      "links": [
        [
          "vanadium",
          "vanadium"
        ],
        [
          "oxidation number",
          "oxidation number"
        ]
      ]
    }
  ],
  "word": "vanadous"
}

{
  "derived": [
    {
      "word": "vanadous acid"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "vanadium",
        "3": "ous"
      },
      "expansion": "vanadium + -ous",
      "name": "suffix"
    }
  ],
  "etymology_text": "From vanadium + -ous.",
  "head_templates": [
    {
      "args": {
        "1": "en",
        "2": "adjective"
      },
      "expansion": "vanadous",
      "name": "head"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English terms suffixed with -ous",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Vanadium"
      ],
      "glosses": [
        "Of, pertaining to or containing vanadium, especially in an oxidation number of 4."
      ],
      "links": [
        [
          "vanadium",
          "vanadium"
        ],
        [
          "oxidation number",
          "oxidation number"
        ]
      ]
    }
  ],
  "word": "vanadous"
}