pebi-

- A binary prefix meaning 2
^{50}, or 1,125,899,906,842,624. For example, a__pebibyte__is__equal__to 2^{50}bytes. This prefix is utilized to refer to only binary quantities, such as bits and bytes Its abbreviation is Pi-. - abbreviation Pi-
- An irrational number whose value is approximately 3.14159265358979, although it continues indefinitely in a non-repeating manner. It is used in many calculations. Its symbol is π.

- noun the ratio of the circumference of a circle to its diameter.

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