Poincaré disk

noun

The hyperbolic plane, viewed as a disk so that Euclidean circles and lines Euclidean-perpendicular to the disk's surface are hyperbolic lines.

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Meanings

nounPoincaré disk (plural Poincaré disks)

plural Poincaré disks · alternative Poincaré disc

  1. The hyperbolic plane, viewed as a disk so that Euclidean circles and lines Euclidean-perpendicular to the disk's surface are hyperbolic lines.

Origin

After Henri Poincaré.

Full word history & related roots →

Translations

Finnish Poincarén kiekko
  • Poincarén kiekkohyperbolic plane
Spanish disco de Poincaré
  • disco de Poincaréhyperbolic plane
Cite this entry
APA

Poincaré disk. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/Poincar%C3%A9%20disk

MLA

“Poincaré disk.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Poincar%C3%A9%20disk. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “Poincaré disk,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/Poincar%C3%A9%20disk.

Source: Poincaré disk on Wiktionary, CC BY-SA 4.0.