"metacetic" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "meta",
        "3": "acetic"
      },
      "expansion": "meta- + acetic",
      "name": "prefix"
    }
  ],
  "etymology_text": "From meta- + acetic.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "metacetic (not comparable)",
      "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 prefixed with meta-",
          "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": "Organic chemistry",
          "orig": "en:Organic chemistry",
          "parents": [
            "Chemistry",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "metacetic acid"
        }
      ],
      "glosses": [
        "propionic"
      ],
      "id": "en-metacetic-en-adj--wMzhUmu",
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "propionic",
          "propionic"
        ]
      ],
      "raw_glosses": [
        "(obsolete, organic chemistry) propionic"
      ],
      "related": [
        {
          "english": "propionate",
          "word": "metacetonate"
        },
        {
          "alt": "propionyl",
          "word": "metacetyl"
        }
      ],
      "tags": [
        "not-comparable",
        "obsolete"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ]
    }
  ],
  "word": "metacetic"
}

{
  "derived": [
    {
      "word": "metacetic acid"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "meta",
        "3": "acetic"
      },
      "expansion": "meta- + acetic",
      "name": "prefix"
    }
  ],
  "etymology_text": "From meta- + acetic.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "metacetic (not comparable)",
      "name": "en-adj"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "adj",
  "related": [
    {
      "english": "propionate",
      "word": "metacetonate"
    },
    {
      "alt": "propionyl",
      "word": "metacetyl"
    }
  ],
  "senses": [
    {
      "categories": [
        "English adjectives",
        "English entries with incorrect language header",
        "English lemmas",
        "English terms prefixed with meta-",
        "English terms with obsolete senses",
        "English uncomparable adjectives",
        "Pages with 1 entry",
        "Pages with entries",
        "en:Organic chemistry"
      ],
      "glosses": [
        "propionic"
      ],
      "links": [
        [
          "organic chemistry",
          "organic chemistry"
        ],
        [
          "propionic",
          "propionic"
        ]
      ],
      "raw_glosses": [
        "(obsolete, organic chemistry) propionic"
      ],
      "tags": [
        "not-comparable",
        "obsolete"
      ],
      "topics": [
        "chemistry",
        "natural-sciences",
        "organic-chemistry",
        "physical-sciences"
      ]
    }
  ],
  "word": "metacetic"
}