Pi.

piaster.

Also, pi.

* * *

pi¹ «py», noun, plural pis.

1. the ratio of the circumference of any circle to its diameter, usually written as π and equal to 3.14159+.

2. the 16th letter of the Greek alphabet, equivalent to English P, p.

╂[(definition 1) < name of Greek letter π, used as abbreviation of Greek periphéreia periphery]

pi² «py», noun, plural pis, verb, pied, pi|ing.

–n.

1. printing types all mixed up.

2. any confused mixture.

–v.t.

to mix up (type). Also, pie.

╂[origin uncertain; perhaps < pie¹ (because of its miscellaneous contents)]

pi³ «py», adjective.

British Informal. pious: »

God's grace (and I don't mean to sound pi) is what England seems to lack at the moment (Listener).

pi.,

piaster.

PI (no periods),

1. photo interpretation.

2. principal investigator (in a scientific experiment or study).

3. private investigator.

4. programed instruction.

P.I.,

Philippine Islands.