lake of Wada

noun

Any of three disjoint connected open sets of the plane or open unit square with the counterintuitive property that they all have the same boundary.

OriginJapanese 和田の湖 →
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Meanings

nounlake of Wada (plural lakes of Wada)

plural lakes of Wada

  1. mathematicsAny of three disjoint connected open sets of the plane or open unit square with the counterintuitive property that they all have the same boundary.

Origin

  1. Japanese和田の湖
  2. Englishlake of Wada

Calque of Japanese 和田の湖. Introduced by Kunizo Yoneyama (in 1917), who credited the discovery to Takeo Wada.

More words from Japanese

Full word history & related roots →
Cite this entry
APA

lake of Wada. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/lake%20of%20Wada

MLA

“lake of Wada.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/lake%20of%20Wada. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “lake of Wada,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/lake%20of%20Wada.

Source: lake of Wada on Wiktionary, CC BY-SA 4.0.