"H₂O" meaning in English

{
  "etymology_text": "Two H initials (Hishammuddin Hussein) represented by H₂ + O for Onn, chosen to humorously match the chemical formula for water.",
  "head_templates": [
    {
      "args": {},
      "expansion": "H₂O",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "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 entries with language name categories using raw markup",
          "parents": [
            "Entries with language name categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "English entries with topic categories using raw markup",
          "parents": [
            "Entries with topic categories using raw markup",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Malaysian English",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Individuals",
          "orig": "en:Individuals",
          "parents": [
            "People",
            "Human",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Malaysian politics",
          "orig": "en:Malaysian politics",
          "parents": [
            "Malaysia",
            "Politics",
            "Asia",
            "Society",
            "Earth",
            "Eurasia",
            "All topics",
            "Nature",
            "Fundamental"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Nicknames of individuals",
          "orig": "en:Nicknames of individuals",
          "parents": [
            "Individuals",
            "Nicknames",
            "People",
            "Names",
            "Human",
            "All topics",
            "Proper nouns",
            "Terms by semantic function",
            "Fundamental",
            "Nouns",
            "Lemmas"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Politics",
          "orig": "en:Politics",
          "parents": [
            "Society",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "glosses": [
        "Hishammuddin Hussein Onn, Malaysian politician and son of Hussein Onn, third prime minister of Malaysia."
      ],
      "id": "en-H₂O-en-name-cgLDJlq9",
      "links": [
        [
          "Internet",
          "Internet"
        ],
        [
          "slang",
          "slang"
        ],
        [
          "humorous",
          "humorous"
        ],
        [
          "politics",
          "politics"
        ]
      ],
      "raw_glosses": [
        "(Malaysia, Internet slang, humorous, politics) Hishammuddin Hussein Onn, Malaysian politician and son of Hussein Onn, third prime minister of Malaysia."
      ],
      "tags": [
        "Internet",
        "Malaysia",
        "humorous"
      ],
      "topics": [
        "government",
        "politics"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˌeɪt͡ʃtuːˈoʊ/",
      "tags": [
        "US"
      ]
    }
  ],
  "word": "H₂O"
}

{
  "etymology_text": "Two H initials (Hishammuddin Hussein) represented by H₂ + O for Onn, chosen to humorously match the chemical formula for water.",
  "head_templates": [
    {
      "args": {},
      "expansion": "H₂O",
      "name": "en-proper noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "name",
  "senses": [
    {
      "categories": [
        "English 3-syllable words",
        "English entries with incorrect language header",
        "English entries with language name categories using raw markup",
        "English entries with topic categories using raw markup",
        "English eponyms",
        "English humorous terms",
        "English internet slang",
        "English lemmas",
        "English proper nouns",
        "English terms spelled with ₂",
        "English terms with IPA pronunciation",
        "English uncountable nouns",
        "Malaysian English",
        "en:Individuals",
        "en:Malaysian politics",
        "en:Nicknames of individuals",
        "en:Politics"
      ],
      "glosses": [
        "Hishammuddin Hussein Onn, Malaysian politician and son of Hussein Onn, third prime minister of Malaysia."
      ],
      "links": [
        [
          "Internet",
          "Internet"
        ],
        [
          "slang",
          "slang"
        ],
        [
          "humorous",
          "humorous"
        ],
        [
          "politics",
          "politics"
        ]
      ],
      "raw_glosses": [
        "(Malaysia, Internet slang, humorous, politics) Hishammuddin Hussein Onn, Malaysian politician and son of Hussein Onn, third prime minister of Malaysia."
      ],
      "tags": [
        "Internet",
        "Malaysia",
        "humorous"
      ],
      "topics": [
        "government",
        "politics"
      ]
    }
  ],
  "sounds": [
    {
      "ipa": "/ˌeɪt͡ʃtuːˈoʊ/",
      "tags": [
        "US"
      ]
    }
  ],
  "word": "H₂O"
}