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We found 17 dictionaries that define the word pis:

General (8 matching dictionaries)
  1. PIs, pis: Merriam-Webster
  2. pis: Collins English Dictionary
  3. PI's, PIs, Pi's, Pis, pis, pis: Wordnik
  4. PIs, pis: Wiktionary
  5. PIS: Dictionary.com
  6. PIS, PiS, Pis (disambiguation), Pis: Wikipedia, the Free Encyclopedia
  7. PIS: Stammtisch Beau Fleuve Acronyms
  8. pis: TheFreeDictionary.com

Business (1 matching dictionary)
  1. PIs: Merriam-Webster Legal Dictionary

Computing (1 matching dictionary)
  1. pis: Encyclopedia

Medicine (1 matching dictionary)
  1. pis: Medical dictionary

Miscellaneous (3 matching dictionaries)
  1. PiS: Acronym Finder
  2. PIS: Three Letter Words with definitions
  3. AbbreviationZ (No longer online)

Science (2 matching dictionaries)
  1. Glossary of Roots of Botanical Names (No longer online)
  2. Archaeology Wordsmith (No longer online)

Slang (1 matching dictionary)
  1. PIS: Urban Dictionary

(Note: See pi as well.)

Definitions from Wiktionary (PI)

noun:  The 16th letter of the Classical and Modern Greek alphabets and the seventeenth in Old Greek.
noun:  (mathematics) An irrational and transcendental constant representing the ratio of the circumference of a Euclidean circle to its diameter; approximately 3.14159265358979323846264338327950; usually written π.
noun:  (letterpress typography) Metal type that has been spilled, mixed together, or disordered.
verb:  (letterpress typography) To spill or mix printing type.
adjective:  (typography) Not part of the usual font character set; especially, non-Roman type or symbols as opposed to standard alphanumeric Roman type.
noun:  (typography) pica (conventionally, 12 points = 1 pica, 6 picas = 1 inch).
noun:  Piaster.
adjective:  Pious.
noun:  (historical) A county of Chengdu, Sichuan, China.
noun:  Abbreviation of Piauí., a state of Brazil. [A state of the Northeast Region, Brazil. Capital: Teresina]
noun:  Initialism of Prison Industries (the prison-run work program for inmates)
noun:  (US, Philippines, historical, dated) Initialism of Philippine Islands. [islands of the Malay Archipelago on which the country of Philippines is situated]
noun:  (informatics, SGML, XML) Initialism of processing instruction.
noun:  Initialism of partial induction (see AI)
noun:  Initialism of personal injury. [(law) An injury to the body, mind or emotions, as opposed to an injury to property.]
noun:  Initialism of politically incorrect (see PC)
noun:  Initialism of principal investigator (lead researcher on a grant-funded project) [(sciences) lead researcher on a grant-funded project]
noun:  Initialism of private investigator. [An agent hired by a private party for the purpose of investigation or evidence gathering.]
noun:  Initialism of parallel import. [A legitimate product imported from another country without the permission of the intellectual property owner.]
noun:  (biochemistry) Abbreviation of phosphatidylinositol (a phospholipid component of eukaryotic cell membranes, also abbreviated in PtdIns) [(chemistry) a phospholipid containing inositol]
noun:  (pharmacology) Initialism of protease inhibitor. [(biochemistry) Any molecule that inhibits the function of proteases (enzymes that aid the cleavage of proteins), e.g. alpha-1 antitrypsin.]
noun:  (organic chemistry) Initialism of polyimide. [(chemistry) Any polymer whose monomers are imides; used to make high-temperature resins]
noun:  (medicine) Initialism of ponderal index. [An anthropometric statistic that combines the height and weight of a person, similar to the body mass index.]
noun:  (surgery) Initialism of penile inversion.
noun:  (electronics) Initialism of power integrity.
noun:  Abbreviation of prohibited immigrant.
noun:  (fan fiction category) Initialism of pseudoincest. [Sexual involvement between family members who are not blood relations (e.g., siblings by adoption, stepparents and stepchildren, in-laws).]
noun:  (automotive) Initialism of port injection. (fuel injection)
noun:  (psychology) Initialism of paradoxical intention. [(psychotherapy) A psychotherapeutic technique used to treat anxiety by repeatedly rehearsing the anxiety-inducing pattern of thought or behaviour, often with exaggeration and humor.]
noun:  (business) Initialism of pro forma invoice.
noun:  (Philippines, politics) Initialism of People’s Initiative.
▸ Also see pi


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