"potassa" meaning in English

{
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "nl",
        "3": "potasch",
        "4": "",
        "5": "potash"
      },
      "expansion": "Dutch potasch (“potash”)",
      "name": "bor"
    },
    {
      "args": {
        "1": "en",
        "2": "potash"
      },
      "expansion": "Doublet of potash",
      "name": "doublet"
    }
  ],
  "etymology_text": "Borrowed from Dutch potasch (“potash”). Doublet of potash.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "potassa (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 5 entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Potassium",
          "orig": "en:Potassium",
          "parents": [
            "Alkali metals",
            "Chemical elements",
            "Metals",
            "Matter",
            "Metallurgy",
            "Chemistry",
            "Nature",
            "Technology",
            "Sciences",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "derived": [
        {
          "word": "potassium"
        }
      ],
      "glosses": [
        "The chemical compound potassium hydroxide."
      ],
      "id": "en-potassa-en-noun-IYaRjMRh",
      "links": [
        [
          "potassium hydroxide",
          "potassium hydroxide"
        ]
      ],
      "raw_glosses": [
        "(obsolete) The chemical compound potassium hydroxide."
      ],
      "synonyms": [
        {
          "word": "caustic potash"
        },
        {
          "word": "potash lye"
        }
      ],
      "tags": [
        "obsolete",
        "uncountable"
      ]
    }
  ],
  "word": "potassa"
}

{
  "derived": [
    {
      "word": "potassium"
    }
  ],
  "etymology_templates": [
    {
      "args": {
        "1": "en",
        "2": "nl",
        "3": "potasch",
        "4": "",
        "5": "potash"
      },
      "expansion": "Dutch potasch (“potash”)",
      "name": "bor"
    },
    {
      "args": {
        "1": "en",
        "2": "potash"
      },
      "expansion": "Doublet of potash",
      "name": "doublet"
    }
  ],
  "etymology_text": "Borrowed from Dutch potasch (“potash”). Doublet of potash.",
  "head_templates": [
    {
      "args": {
        "1": "-"
      },
      "expansion": "potassa (uncountable)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English doublets",
        "English entries with incorrect language header",
        "English lemmas",
        "English nouns",
        "English terms borrowed from Dutch",
        "English terms derived from Dutch",
        "English terms with obsolete senses",
        "English uncountable nouns",
        "Pages with 5 entries",
        "Pages with entries",
        "en:Potassium"
      ],
      "glosses": [
        "The chemical compound potassium hydroxide."
      ],
      "links": [
        [
          "potassium hydroxide",
          "potassium hydroxide"
        ]
      ],
      "raw_glosses": [
        "(obsolete) The chemical compound potassium hydroxide."
      ],
      "tags": [
        "obsolete",
        "uncountable"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "caustic potash"
    },
    {
      "word": "potash lye"
    }
  ],
  "word": "potassa"
}