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).

Pi

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

PI

Abbreviation for Periodontal Index.

Pi

Abbreviation for inorganic phosphate.

pI

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

pi (π, Π),

(),
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

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.

Pi

Abbreviation for inorganic orthophosphate.

PI

Abbreviation for Periodontal Index.

pI

Abbreviation for isoelectric point.

pi

(π, Π) ()
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 ()
1. The 16th letter of the Greek alphabet.
2. (Π). Symbol for osmotic pressure; in mathematics, symbol for the product of a series.
References in periodicals archive ?
where AC is arm circumference, TSF is triceps skinfold thickness, and [pi] = 3.1416.
To accurately report mitotic counts, the following calculations must be performed: (1) determine the ocular field diameter of the x40 magnification field using a slide micrometer and determine the radius of the field, for example, for a X40 magnification field, if the ocular field diameter is 0.56 mm, the calculated radius is 0.28 mm; (2) calculate the area of a single HPF using the formula [pi][r.sup.2], for example, 3.1416 x 0.28 X 0.28 = 0.25 [mm.sup.2]; and (3) divide that value by the Armed Forces Institute of Pathology's recommended 5[mm.sup.2], which yields 20 HPFs.
We found these are plain exponential functions [A.sup.x/y], where A is presented by special numbers [pi] = 3.1416..., [member of] = 2.17183 ..., and the reverse fine structure constant a = 137.036...
La forma se determino numericamente con el indice de diversidad de Patton: R = p/2[([pi]A).sup.1/2], en donde p es el perimetro, A es el area y [pi] es 3.1416. Este indice varia entre uno (circulo perfecto) e infinito (formas no circulares) (Patton, 1975).
where r is the radium of measuring electrode, D the thickness of coat, [pi] = 3.1416, [D.sub.2] the internal diameter of protective electrode, and [D.sub.1] is the diameter of measuring electrode.
Divide this number by 'pi' (3.1416) using your calculator.
The Japanese approach is so different from the typical approach by English-speakers, which involves counting the number of letters in a phrase such as "How I need a drink." or (3.1416) "May I draw a circle?" "Yes, I have a number." See http://en.wikiquote.org/wiki/English_mathematics_mnemonics#Pi for examples of such phrases.