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What does PI stand for? 

What does PI mean? This page is about the various possible meanings of the acronym, abbreviation, shorthand or slang term: PI.

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PI

Post Intelligencer

Community » News & Media

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PI

Principal Investigator

Academic & Science » Ocean Science -- and more...

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PI

Personal Information

Computing » Cyber & Security

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PI

Performance Index

Business » General Business

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PI

Protease Inhibitor

Medical » Human Genome -- and more...

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PI

Personal Injury

Medical » Physiology

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PI

Propidium Iodide

Medical » Laboratory

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PI

Program Improvement

Community » Educational

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PI

Private Investigator

Business » Occupation & Positions -- and more...

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PI

Public Information

Governmental » US Government

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PI

Pages In

Computing » Assembly

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PI

Performance Improvement

Business » General Business

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PI

Primary Investigator

Business » Occupation & Positions

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PI

Performance Indicator

Business » Stock Exchange -- and more...

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PI

Polyimide

Miscellaneous » Plastics

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PI

Processing Instruction

Computing » Assembly

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PI

Proportional Integral

Academic & Science » Electronics

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PI

Programming Interface

Computing » Software

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PI

Process Information

Computing » General Computing

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PI

Public Instruction

Community » Educational

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PI

Public Involvement

Community

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PI

Platform Independent

Computing » Hardware

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PI

Plant Information

Business » General Business

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PI

Principle Investigator

Business » Occupation & Positions

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PI

Philippine Islands

Regional » Countries

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PI

Post Injection

Medical » Physiology

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PI

Pocket Informant

Computing » General Computing

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PI

Precision Instruments

Governmental » Suppliers

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PI

Plant Introduction

Academic & Science » Botany

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PI

Position Independent

Business » Occupation & Positions

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PI

Portfolio Investment

Business » Stock Exchange

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PI

3.1415926535

Academic & Science » Physics -- and more...

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PI

Process Innovation

Business » General Business

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PI

Project Inform

Community » Non-Profit Organizations

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PI

Photo Impact

Community » News & Media

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PI

Product Improvement

Governmental » Military

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PI

Provider Independent

Business » General Business

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PI

Phosphate Ion

Academic & Science » Chemistry

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PI

Per Inquiry

Governmental » US Government

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PI

Project Idea

Business » General Business

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PI

Page Impression

Internet

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PI

Processor Interface

Computing » Hardware

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PI

Packet Interface

Computing » Hardware

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PI

Policy Iteration

Governmental » US Government

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PI

Protocol Interpreter

Computing » Networking

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PI

Path Identifier

Computing » Networking

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PI

Penile Implant

Medical » Physiology

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PI

Population Institute

Community » Non-Profit Organizations

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PI

Paranormal Investigator

Business » Occupation & Positions

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PI

Parity Inner

Computing » Hardware

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PI

Present illness

Medical » Physiology

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PI

Pyramid Inch

Miscellaneous » Unit Measures

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PI

Pulmonary Insufficiency

Medical » Physiology

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PI

Pulse Induction

Academic & Science » Electronics

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PI

Presence Information

Computing » Networking

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PI

Property Inspector

Business » Occupation & Positions

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PI

Paternity Index

Governmental » Law & Legal

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PI

Physician Investigator

Business » Occupation & Positions

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PI

Post Institutionalized

Governmental » Law & Legal

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PI

Premdor, Inc.

Business » NYSE Symbols

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PI

Permanently Identified

Governmental » Law & Legal

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PI

Plan Internacional

International » Guatemalan

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PI

Power Intelligence

Computing » General Computing

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PI

Polarisation Index

Academic & Science » Physics

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PI

Political Informant

Business » Occupation & Positions

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PI

Program Integrator

Business » Occupation & Positions

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PI

Pure Integrity

Business » Occupation & Positions

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PI

Priceless Inn

Business » Companies & Firms

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PI

Priority Inherit

Computing » General Computing

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PI

Preliminary Index

Community » News & Media

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PI

Power Investiture

Governmental

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PI

Pure Imported

Governmental » US Government

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PI

Pilipino Insurrecto

Governmental » Military

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PI

Publications Inquiry

Community » News & Media

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PI

Problem Investigator

Business » Occupation & Positions

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PI

Pool Instructor

Business » Occupation & Positions

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PI

Paducah and Illinois Railroad

Regional » Railroads

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PI

Pareto Improved

Academic & Science » Mathematics

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PI

Phantom Investigator

Miscellaneous » Funnies

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PI

Participating Informant

Governmental » Law & Legal

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PI

Post Inaccrochable

Community » News & Media

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PI

Patternology International

Business » Companies & Firms

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PI

Pengajian Inggeris

Academic & Science » Universities

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PI

Perpetual Idiosy

Medical » Physiology

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PI

Pisa (Provence)

International » Italian

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PI

Proforma Invoice

Business » General Business

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PI

Pre-Invoice

Business » Accounting

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PI

Public Intoxication

Governmental » Law & Legal

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PI

Police Inspector

Governmental » Police

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PI

Public Inquiry

Academic & Science » Libraries

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PI

Process Intelligence

Miscellaneous » Unclassified

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PI

Power Improved

Business » Products

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PI

Partnership for Innovation

Miscellaneous » Unclassified

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PI

Principal and Interest

Miscellaneous » Unclassified

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PI

Parent Involvement

Miscellaneous » Unclassified

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PI

Perfusion Index

Miscellaneous » Unclassified

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PI

Perpetual Inventory

Miscellaneous » Unclassified

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PI

Par Interim

Governmental » Law & Legal

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PI

Path Identification

Miscellaneous » Unclassified

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PI

Patient Initials

Miscellaneous » Unclassified

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PI

Pen and Ink (Document Update)

Governmental » NASA

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PI

Perfectly Incomplete

Business » Companies & Firms

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PI

Performance Improved

Miscellaneous » Unclassified

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PI

Perfusion Imaging

Medical » British Medicine

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PI

Perlite Institute

Business » Professional Organizations

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PI

Personal Investigator

Miscellaneous » Unclassified

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PI

Petrol Injection

Business » Products

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PI

Phosphatidyl Inositol

Medical » British Medicine

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PI

Planetary Image

Miscellaneous » Unclassified

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PI

Police Informant

Governmental » Police

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PI

Prison Industries

Miscellaneous » Unclassified

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PI

Product It

Miscellaneous » Unclassified

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PI

Professionalism and Integrity

Business » General Business

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PI

Purchasing Instruction

Miscellaneous » Unclassified

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PI

Pacific Islander

Academic & Science » Genealogy

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PI

Package Insert

Governmental » FDA

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PI

Pain Intensity

Medical » British Medicine -- and more...

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PI

Pancreatic Insufficiency

Medical » British Medicine

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PI

Parallel Imports

Medical » British Medicine

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PI

Paramagnetic Insulator

Business » Products

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PI

Pars Intermedia

Medical » British Medicine

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PI

Payload Interrogator

Governmental » NASA

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PI

Payment Instrument

Business » Accounting

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PI

Pearl Index

Medical » British Medicine

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PI

Penal Interest

Business » Banking

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PI

Penalty Indicator

Business » General Business

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PI

Penning ionization [

Academic & Science » Physics

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PI

Perimeter Institute for Theoretical Physics

Academic & Science » Physics -- and more...

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PI

Peripheral Iridectomy

Medical » British Medicine

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PI

Physically Impaired

Medical » British Medicine

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PI

Physiologic Index

Medical » British Medicine

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PI

Piaui

Regional

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PI

pituitary

Medical » British Medicine

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PI

Plaque Inhibition

Medical » British Medicine

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PI

Point of Impact

Governmental » Military

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PI

Poison Ivy

Medical » British Medicine

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PI

Post Implantation

Medical » British Medicine

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PI

Post Infection

Medical » British Medicine

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PI

Post Inoculation

Medical » British Medicine

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PI

Post Irradiation

Medical » British Medicine

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PI

Post Ischaemic

Medical » British Medicine

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PI

Postal Inspectors

Governmental » US Government

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PI

Preliminary Investigation

Governmental » NASA

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PI

Prepaid Interest

Business » Accounting

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PI

Primary Infection

Medical » British Medicine

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PI

Primary Instructor

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PI

Probability of Incapacitation

Governmental » Military

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PI

Procedural Item

Governmental » Military

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PI

Procurement Item

Governmental » NASA

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PI

Product Information

Business » Products

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PI

Product Innovation

Business » Products

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PI

Product Integration

Computing » Software

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PI

Prognostic Index

Medical » British Medicine

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PI

Program Introduction

Governmental » NASA

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PI

Proliferation Index

Medical » British Medicine

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PI

Pulmonary Index

Medical » British Medicine

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PI

Pulmonary Infarction

Medical » British Medicine

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PI

Pulse Inversion

Medical » British Medicine

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PI

Purposeful Interference

Governmental » Military

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What does PI mean?

pi(noun)
the ratio of the circumference to the diameter of a circle; approximately equal to 3.14159265358979323846...

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pi