パイ

See also: ハイ, バイ, and Appendix:Variations of "pai"

Japanese

Pronunciation

(Tokyo) パイ [páꜜì] (Atamadaka – [1])[1][2]
IPA^(key): [pa̠i]

Etymology 1

パイ (pai): a pear pie.

From English pie.[1][2][3]

Noun

パイ • (pai)

a pie (type of pastry)

Etymology 2

パイ (pai): an example of the mathematical constant pi.

From English pi,[1][2] ultimately from Ancient Greek πεῖ (peî).

Noun

パイ • (pai)

(mathematics) pi
Synonyms: (for circles) 円周率 (enshūritsu), (for mathematical products) 相乗積 (sōjōseki)

Usage notes

In Japanese mathematics notation, lower-case π is used to represent the constant of the ratio of the circumference of a circle to its diameter (3.14159265...). Upper-case Π is used to represent a product of a multiplication operation.

References

2006, 大辞林 (Daijirin), Third Edition (in Japanese), Tōkyō: Sanseidō, →ISBN
1997, 新明解国語辞典 (Shin Meikai Kokugo Jiten), Fifth Edition (in Japanese), Tōkyō: Sanseidō, →ISBN
1988, 国語大辞典（新装版） (Kokugo Dai Jiten, Revised Edition) (in Japanese), Tōkyō: Shogakukan

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