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![pi - "name for Greek symbol representing the ratio of the circumference of a circle to its diameter; approximately 3.1416" by AcronymsAndSlang.com pi - "name for Greek symbol representing the ratio of the circumference of a circle to its diameter; approximately 3.1416" by AcronymsAndSlang.com](http://acronymsandslang.com/acronym_image/306/2e0c6cfdc95a5f1cfab4d169c3a8f00f.jpg)
pi - "name for Greek symbol representing the ratio of the circumference of a circle to its diameter; approximately 3.1416" by AcronymsAndSlang.com
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Instrument Abbreviations Used in Instrumentation Diagrams (P&ID) ~ Learning Instrumentation And Control Engineering
![PI Definition: [not an acronym] name for Greek symbol representing the ratio of the circumference of a circle to its diameter; approximately 3.1416 | Abbreviation Finder PI Definition: [not an acronym] name for Greek symbol representing the ratio of the circumference of a circle to its diameter; approximately 3.1416 | Abbreviation Finder](https://www.abbreviationfinder.org/images/entry_pdf/pi/no/pi_not-an-acronym-name-for-greek-symbol-representing-the-ratio-of-the-circumference-of-a-circle-to-its-diameter-approximately-3-1416.png)