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圓周率

简圆周率 · 繁圓周率

Mandarin · pinyin yuán zhōu lǜ

(math.) the ratio of the circumference of a circle to its diameter (π)

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Characters in this entry

圓: yuán · circle; round, circular; complete
周: zhōu · Zhou dynasty; circumference
率: lǜ · to lead; ratio; rate; limit
圆: yuán · circle; round, circular; complete

Written characters and their own readings; the entry’s pronunciation is shown above.

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Mandarin tones

2–1–4 · yuan2 zhou1 lu:4

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Follow a written form into the eight pinned witnesses: Analects, Mencius, Laozi, Zhuangzi, Xunzi, Han Feizi, Sunzi and the Mao Shijing. A match is a place to investigate; it does not prove that a modern dictionary sense fits the passage.

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Rime Cantonese 粵拼

jyun4 zau1 leot2

Cantonese word readings for 圓周率. This lexicon supplies readings, not definitions.

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Wiktionary English definitions · Chinese section

Independent source senses for this spelling, with usage labels retained. Not matched to the pronunciation above.

noun

pi (ratio of the circumference of a circle to its diameter)

Source page · dump 2026-09-02 · Contributors & history

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