Dictionary

pi en · NOUN · etymology 1

Pronunciation

• (US) audio
• /paɪ/

Etymology

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.

Meanings

1. (countable, uncountable) The sixteenth letter of the Classical and Modern Greek alphabets and the seventeenth in Old Greek.
2. (countable, uncountable) An irrational and transcendental constant representing the ratio of the circumference of a Euclidean circle to its diameter; approximately 3.14159265.

Forms

Deriveds

pi font · pi-heptomino · pi meson · pith · pilish · pion · pi-plus · pi-system · pi bond · pi-minus · piphilology · piem

Relateds

mul:π · grc:π

Synonyms

Ludolph's number · Archimedes' constant · Ludolphian number · Ludolph's constant

Translations (86)

grc πεῖ (letter of Greek alphabet) · ru пи (irrational mathematical constant) · fr pi (irrational mathematical constant) · sk pí (letter of Greek alphabet) · nl pi (letter of Greek alphabet) · gu પાઇ (letter of Greek alphabet) · ar بِي (letter of Greek alphabet) · fa پی (irrational mathematical constant) · de Pi (letter of Greek alphabet) · mk пи (irrational mathematical constant) · fr pi (letter of Greek alphabet) · fa پی (letter of Greek alphabet) · he פאי (letter of Greek alphabet) · sh пи̑ (irrational mathematical constant) · sh пи̑ (letter of Greek alphabet) · sd پاءِ (letter of Greek alphabet) · ro pi (letter of Greek alphabet) · gl pi (letter of Greek alphabet) · es pi (letter of Greek alphabet) · ko 파이 (irrational mathematical constant) · sh pȋ (letter of Greek alphabet) · is pí (irrational mathematical constant) · nl pi (irrational mathematical constant) · ca pi (letter of Greek alphabet) · sl pí (letter of Greek alphabet) · ar بَاي (irrational mathematical constant) · ast pi (letter of Greek alphabet) · ia pi (irrational mathematical constant) · tr pi sayısı (irrational mathematical constant) · fi pii (letter of Greek alphabet) · it pi greco (letter of Greek alphabet) · kmr pî (irrational mathematical constant) · pt pi (letter of Greek alphabet) · hu pí (irrational mathematical constant) · lv pī (letter of Greek alphabet) · grc πῖ (letter of Greek alphabet) · tr pi (irrational mathematical constant) · de Pi (irrational mathematical constant) · eo pio (letter of Greek alphabet) · pl pi (irrational mathematical constant) · pt pi (irrational mathematical constant) · sd پاءِ (irrational mathematical constant) · fi pii (irrational mathematical constant) · sv pi (letter of Greek alphabet) · de Kreiszahl (irrational mathematical constant) · es pi (irrational mathematical constant) · sv pi (irrational mathematical constant) · yue 圓周率 /圆周率 (irrational mathematical constant) · is pí (letter of Greek alphabet) · ko 원주율 (irrational mathematical constant) · ko 파이 (letter of Greek alphabet) · pl pi (letter of Greek alphabet) · sl pí (irrational mathematical constant) · ro pi (irrational mathematical constant) · mi pae (irrational mathematical constant) · cs pí (irrational mathematical constant) · cy pi (irrational mathematical constant) · mk пи (letter of Greek alphabet) · tr pi (letter of Greek alphabet) · he פַּי (letter of Greek alphabet) · el πι (letter of Greek alphabet) · ga pí (letter of Greek alphabet) · ja パイ (irrational mathematical constant) · el πι (irrational mathematical constant) · li pi (irrational mathematical constant) · it pi greco (irrational mathematical constant) · ja パイ (letter of Greek alphabet) · hi पाइ (irrational mathematical constant) · ar پِي (letter of Greek alphabet) · cmn 圓周率 /圆周率 (irrational mathematical constant) · ms pi (letter of Greek alphabet) · sk pí (irrational mathematical constant) · hi पाइ (letter of Greek alphabet) · ja 円周率 (irrational mathematical constant) · cmn 派 (letter of Greek alphabet) · cmn 派 (irrational mathematical constant) · kmr pî (letter of Greek alphabet) · ga pí (irrational mathematical constant) · sh pȋ (irrational mathematical constant) · ar ط (irrational mathematical constant) · ia pi (letter of Greek alphabet) · ru пи (letter of Greek alphabet) · gu પાઇ (irrational mathematical constant) · hu pí (letter of Greek alphabet) · li pie (irrational mathematical constant) · kn ಪೈ (irrational mathematical constant)

wikidata: Q167 · wikidata: Q168 · wikipedia: Technische Universität Berlin

pi en · ADJ · etymology 2

Etymology

Unclear. Possibly from the Greek letter (see Etymology 1) as a common example of non-alphabetic character, possibly from pica (“type size”) (see Etymology 3), possibly from pie referring to its mixed nature or pied (“checkered, multicoloured”).

Meanings

1. (not-comparable) Not part of the usual font character set; especially, non-Roman type or symbols as opposed to standard alphanumeric Roman type.
   • In computing, pi characters may be entered with special key combinations.

Deriveds

pi character

Translations (1)

fi erikois- (not part of the usual font)

wikipedia: Technische Universität Berlin

pi en · NOUN · etymology 2

Etymology

Unclear. Possibly from the Greek letter (see Etymology 1) as a common example of non-alphabetic character, possibly from pica (“type size”) (see Etymology 3), possibly from pie referring to its mixed nature or pied (“checkered, multicoloured”).

Meanings

1. (countable, uncountable) Metal type that has been spilled, mixed together, or disordered.

Forms

Relateds

pie

Translations (2)

it pasticcio (metal type that has been spilled) · it confusione (metal type that has been spilled)

wikipedia: Technische Universität Berlin

pi en · VERB · etymology 2

Etymology

Unclear. Possibly from the Greek letter (see Etymology 1) as a common example of non-alphabetic character, possibly from pica (“type size”) (see Etymology 3), possibly from pie referring to its mixed nature or pied (“checkered, multicoloured”).

Meanings

1. To spill or mix printing type.

Forms

Relateds

pie

wikipedia: Technische Universität Berlin

pi en · ADJ · etymology 3

Etymology

Abbreviations.

Meanings

1. Pious.
   • “Those are very 'pi' sentiments. Was a preacher in Staffordshire— I was raised chapel, though've tried to forget it—he talked that way... redemption and the lot.” 1972, Anya Seton, Green Darkness, Hachette UK, →ISBN:
   • In Sense and Sensibility, as even you might agree, there's at least the danger of a rather pi moral framework clamping down on the spontaneous fun and leaving the sisters to survive - a bit drearily - on the periphery of a mean world. 1994, Roger Gard, Jane Austen's Novels: The Art of Clarity, Yale University Press, →ISBN, page 101:
   • Our Major was "Cherub" Cheeseman, noted for his foul language. I am afraid he lost a tidy little legacy that he was expecting from his aunt, the Dowager Lady Shuttlecock (a very "pi" old lady), through this same habit of his. 1927, Magdalen King-Hall, I Think I Remember: Being the Random Recollections of Sir Wickham Woolicomb, an Ordinary English Snob and Gentleman:

Deriveds

pi-jaw

Relateds

cicero · pi sai · pica stick

wikipedia: Technische Universität Berlin

pi en · NOUN · etymology 3

Etymology

Abbreviations.

Meanings

1. pica (conventionally, 12 points = 1 pica, 6 picas = 1 inch).
2. Piaster.

wikipedia: Technische Universität Berlin