unit circle

Meanings

noununit circle (plural unit circles)

usuallyA circle of radius 1.
occasionally; the unit circle; occasionally; the unit circlemathematicsThe circle of radius 1 with centre at the origin, used in defining trigonometric functions.

Czech jednotková kružnice

jednotková kružnicecircle of radius 1 with centre at the origin, used in trigonometry

Dutch eenheidscirkel

eenheidscirkelcircle of radius 1 with centre at the origin, used in trigonometry

Finnish yksikköympyrä, yksikköympyrä

French cercle unité, cercle trigonométrique

cercle unitécircle of radius 1
cercle trigonométriquecircle of radius 1 with centre at the origin, used in trigonometry
cercle unitécircle of radius 1 with centre at the origin, used in trigonometry

German Einheitskreis, Einheitskreis

Hungarian egységkör

Italian circonferenza unitaria, circonferenza unitaria

circonferenza unitariacircle of radius 1
circonferenza unitariacircle of radius 1 with centre at the origin, used in trigonometry

Polish okrąg jednostkowy, okrąg jednostkowy

okrąg jednostkowycircle of radius 1
okrąg jednostkowycircle of radius 1 with centre at the origin, used in trigonometry

Russian единичная окружность, едини́чный круг

единичная окружность (jediničnaja okružnostʹ)circle of radius 1
едини́чный круг (jediníčnyj krug)circle of radius 1 with centre at the origin, used in trigonometry

Spanish circunferencia unitaria, circunferencia unitaria

circunferencia unitariacircle of radius 1
circunferencia unitariacircle of radius 1 with centre at the origin, used in trigonometry

Swedish enhetscirkel, enhetscirkel

Tagalog isahing bilog, isahing bilog

Cite this entry

APA

unit circle. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/unit%20circle

MLA

“unit circle.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/unit%20circle. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “unit circle,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/unit%20circle.