"tartarous" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "tartar",
        "3": "ous"
      },
      "expansion": "tartar + -ous",
      "name": "suffix"
    }
  ],
  "etymology_text": "From tartar + -ous.",
  "forms": [
    {
      "form": "more tartarous",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most tartarous",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "tartarous (comparative more tartarous, superlative most tartarous)",
      "name": "en-adj"
    }
  ],
  "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"
        }
      ],
      "glosses": [
        "Of, pertaining to, or derived from tartar."
      ],
      "id": "en-tartarous-en-adj-Nq~eQl~9",
      "links": [
        [
          "tartar",
          "tartar"
        ]
      ],
      "synonyms": [
        {
          "word": "tartareous"
        }
      ]
    }
  ],
  "word": "tartarous"
}

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "tartar",
        "3": "ous"
      },
      "expansion": "tartar + -ous",
      "name": "suffix"
    }
  ],
  "etymology_text": "From tartar + -ous.",
  "forms": [
    {
      "form": "more tartarous",
      "tags": [
        "comparative"
      ]
    },
    {
      "form": "most tartarous",
      "tags": [
        "superlative"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "tartarous (comparative more tartarous, superlative most tartarous)",
      "name": "en-adj"
    }
  ],
  "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"
      ],
      "glosses": [
        "Of, pertaining to, or derived from tartar."
      ],
      "links": [
        [
          "tartar",
          "tartar"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "word": "tartareous"
    }
  ],
  "word": "tartarous"
}