pi

Mane (Îngilîzî)

Têgeh

Werger

πι

pi

pika

3.14159265358979323846

بِي

Pircarînî

C2
Wekî (IPA) tê bilêvkirin
/paɪ/
Etîmolojî (Îngilîzî)

From Ancient Greek πεῖ (peî), ultimately from Proto-Semitic *pay- (“mouth”). Doublet of pe. Its mathematical use apparently stems from its use as the first letter in περιφέρεια (periphéreia, “periphery; circumference”) and was first cited in 1706 in the Synopsis Palmariorum Matheseos by William Jones.

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