| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024pi1 /paɪ/USA pronunciation n. [countable], pl. pis. - Linguisticsthe 16th letter of the Greek alphabet (&Pgr, π).
- Mathematics
- the letter π, used as the symbol for the ratio of the circumference of a circle to its diameter.
- the ratio itself, a number usually given as 3.141592+.
WordReference Random House Unabridged Dictionary of American English © 2024pi1 (pī),USA pronunciation n., pl. pis. - Linguisticsthe 16th letter of the Greek alphabet (II, π).
- Linguisticsthe consonant sound represented by this letter.
- Mathematics
- the letter π, used as the symbol for the ratio of the circumference of a circle to its diameter.
- the ratio itself: 3.141592+.
- Greek pî, peî; used in mathematics to represent Greek periphérion periphery
- 1835–45
- Printingprinting types mixed together indiscriminately.
- any confused mixture;
jumble.
v.t. - Printingto reduce (printing types) to a state of confusion.
- to jumble.
Also, pie. - origin, originally uncertain 1650–60
- Lawpersonal injury.
- principal investigator.
- private investigator.
Pi., - piaster.
Also, pi. P.I., - Place NamesPhilippine Islands.
- Also, p.i. private investigator.
Collins Concise English Dictionary © HarperCollins Publishers:: pi /paɪ/ n ( pl pis)- the 16th letter in the Greek alphabet (Π, π), a consonant, transliterated as p
- a transcendental number, fundamental to mathematics, that is the ratio of the circumference of a circle to its diameter. Approximate value: 3.141 592…; symbol: π
Etymology: 18th Century (mathematical use): representing the first letter of Greek periphereia periphery pi, pie /paɪ/ n ( pl pies)- a jumbled pile of printer's type
- a jumbled mixture
vb (pies, piing, pied, pies, pieing, pied)(transitive)- to spill and mix (set type) indiscriminately
- to mix up
Etymology: 17th Century: of uncertain origin pi /paɪ/ adj - Brit slang
short for pious,
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