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pi

/paɪ/ やや難 頻度 6605位

意味

  1. パイ(ギリシア語アルファベットの第16字Π,π;英語のP,pに相当)
  2. 円周率(記号はπ)
  3. ごちゃまぜの活字
  4. ごちゃまぜ,混乱

例文

語源

英語の原文(Wiktionary)

From Koine Greek πῖ (pî), 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.

出典: Wiktionary「pi」(CC BY-SA 4.0)

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