H₂O

US/ˌeɪt͡ʃtuːˈoʊ/

proper noun

Hishammuddin Hussein Onn, Malaysian politician and son of Hussein Onn, third prime minister of Malaysia.

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Meanings

proper noun
  1. InternetMalaysiahumorousgovernmentHishammuddin Hussein Onn, Malaysian politician and son of Hussein Onn, third prime minister of Malaysia.

Synonyms & antonyms

Also see
dihydrogen monoxidewater

Origin

Two H initials (Hishammuddin Hussein) represented by H₂ + O for Onn, chosen to humorously match the chemical formula for water.

Full word history & related roots →
Cite this entry
APA

H₂O. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/H%E2%82%82O

MLA

“H₂O.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/H%E2%82%82O. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “H₂O,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/H%E2%82%82O.

Source: H₂O on Wiktionary, CC BY-SA 4.0.