# pi

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## π

**1.**The 16th letter of the Greek alphabet, pi.

**2.**Symbol for the ratio of the circumference of a circle to its diameter, approximately 3.14159; symbol for osmotic pressure (Π).

## P_{i}

Symbol for inorganic orthophosphate (should not be used when covalently linked to another moiety).

## PI

Abbreviation for Periodontal Index.

## Pi

Abbreviation for inorganic phosphate.

## p*I*

The pH value for the isoelectric point of a given substance.

## pi (π, Π),

(pī),**1.**The 16th letter of the Greek alphabet.

**2.**(Π). Symbol for osmotic pressure; in mathematics, symbol for the product of a series.

**3.**(π). Symbol for the ratio of the circumference of a circle to its diameter (approximately 3.14159).

**4.**Symbol for

*pros*.

## pi

[pī]

**1**Ρ, π, the sixteenth letter of the Greek alphabet.

**2**(in mathematics) the ratio of a circle's circumference to its diameter.

## PI

Abbreviation for:package insert

pain intensity

pancreatic insufficiency

parallel imports

pars intermedia

paternity index

Pearl Index

performance indicator, see there

perfusion imaging

peripheral iridectomy

phosphatidyl inositol

physically impaired

physiologic index

pituitary

plaque inhibition

poison ivy

post-implantation

post-infection

post-injection

post-inoculation

post-irradiation

post-ischaemic

present illness

primary infection

principal investigator

product information

prognostic index

proliferation index

protease inhibitor

pulmonary index

pulmonary infarction

pulmonary insufficiency

pulse inversion

## π

Greek, lower case, pi.

## Π

Abbreviation for osmotic pressure;

pi.

## P_{i}

Abbreviation for inorganic orthophosphate.

## PI

Abbreviation for Periodontal Index.

## pI

Abbreviation for isoelectric point.

## pi

**(π, Π)**(pī)

**1.**The 16th letter of the Greek alphabet (π, Π).

**2.**Osmotic pressure (Π).

**3.**mathematics Symbol for the product of a series (Π).

**4.**Symbol for the ratio of the circumference of a circle to its diameter (approximately 3.14159265) (π).

## Π

Abbreviation for osmotic pressure.

## PI

Abbreviation for Periodontal Index.

## pI

Abbreviation for isoelectric point.

## pi

**, π**(pī)

**1.**The 16th letter of the Greek alphabet.

**2.**(Π). Symbol for osmotic pressure; in mathematics, symbol for the product of a series.

## P_{i}

inorganic orthophosphate.

## pI

isoelectric point.

## pi

the sixteenth letter of the Greek alphabet, π or π.

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