What does PI stand for?

The list of PI abbreviation meanings.

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2
Polyimide(Polymer, Chemistry, Medicine)
2
Polyisoprene(Polymer, Chemistry, Medicine)
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APASmart Define. (2018). pi. Retrieved September 26, 2026, from http://smartdefine.org/pi/abbreviations/f/Chemistry
ChicagoSmart Define. 2018. "pi" http://smartdefine.org/pi/abbreviations/f/Chemistry (accessed September 26, 2026).
HarvardSmart Define 2018, pi, Smart Define, viewed 26 September, 2026, <http://smartdefine.org/pi/abbreviations/f/Chemistry>.
MLASmart Define. "pi" 2 February 2018. Web. 26 September 2026. <http://smartdefine.org/pi/abbreviations/f/Chemistry>